The answers of the limits are:
[tex](a) \(\lim_{{x \to -3}} \frac{{3x^2 + 2x - 15}}{{5 - x}} = -\frac{{3}}{{2}}\)\\(b) \(\lim_{{u \to 2}} \frac{{2u + 2}}{{u^2 + 3}} = \frac{{6}}{{7}}\)\\(c) \(\lim_{{x \to 0}} \frac{{\sqrt{{9x^2 + 5x + 1}}}}{{2x - 1}} = -1\)\\(d) \(\lim_{{x \to \infty}} (1 - 2020x)^{\frac{{1}}{{2}}}\) does not exist (DIV)..[/tex]
Let's evaluate the limits one by one:
(a) [tex]\(\lim_{{x \to -3}} \frac{{3x^2 + 2x - 15}}{{5 - x}}\)[/tex]
To find the limit, we substitute the value -3 into the expression:
[tex]\(\lim_{{x \to -3}} \frac{{3(-3)^2 + 2(-3) - 15}}{{5 - (-3)}} = \lim_{{x \to -3}} \frac{{9 - 6 - 15}}{{5 + 3}} = \lim_{{x \to -3}} \frac{{-12}}{{8}} = -\frac{{3}}{{2}}\)[/tex]
Therefore, the limit is [tex]\(-\frac{{3}}{{2}}\)[/tex].
(b) [tex]\(\lim_{{u \to 2}} \frac{{2u + 2}}{{u^2 + 3}}\)[/tex]
Again, we substitute the value 2 into the expression:
[tex]\(\lim_{{u \to 2}} \frac{{2(2) + 2}}{{2^2 + 3}} = \lim_{{u \to 2}} \frac{{4 + 2}}{{4 + 3}} = \lim_{{u \to 2}} \frac{{6}}{{7}} = \frac{{6}}{{7}}\)[/tex]
Therefore, the limit is [tex]\(\frac{{6}}{{7}}\)[/tex].
(c) [tex]\(\lim_{{x \to 0}} \frac{{\sqrt{{9x^2 + 5x + 1}}}}{{2x - 1}}\)[/tex]
Substituting 0 into the expression:
[tex]\(\lim_{{x \to 0}} \frac{{\sqrt{{9(0)^2 + 5(0) + 1}}}}{{2(0) - 1}} = \lim_{{x \to 0}} \frac{{\sqrt{{1}}}}{{-1}} = \lim_{{x \to 0}} -1 = -1\)[/tex]
Therefore, the limit is -1.
(d) [tex]\(\lim_{{x \to \infty}} (1 - 2020x)^{\frac{{1}}{{2}}}\)[/tex]
As x approaches infinity, the term [tex]\((1 - 2020x)\)[/tex] tends to be negative infinity. Therefore, the expression [tex]\((1 - 2020x)^{\frac{{1}}{{2}}}\)[/tex] is undefined.
Therefore, the limit does not exist (DIV).
Therefore,
[tex](a) \(\lim_{{x \to -3}} \frac{{3x^2 + 2x - 15}}{{5 - x}} = -\frac{{3}}{{2}}\)\\(b) \(\lim_{{u \to 2}} \frac{{2u + 2}}{{u^2 + 3}} = \frac{{6}}{{7}}\)\\(c) \(\lim_{{x \to 0}} \frac{{\sqrt{{9x^2 + 5x + 1}}}}{{2x - 1}} = -1\)\\(d) \(\lim_{{x \to \infty}} (1 - 2020x)^{\frac{{1}}{{2}}}\) does not exist (DIV)..[/tex]
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Compute the values of the product (1+1/+ 1 + 1) --- (1+) for small values of n in order to conjecture a general formula for the product. Fill in the blank with your conjecture. (1 + -) 1 + X 1 + $) -
The values of the product (1 + 1/2) * (1 + 1/3) * (1 + 1/4) * ... * (1 + 1/n) for small values of n suggest a general formula for the product. Filling in the blank, the conjectured formula is (1 + 1/n).
To calculate the values of the product for small values of n, we can substitute different values of n into the formula (1 + 1/2) * (1 + 1/3) * (1 + 1/4) * ... * (1 + 1/n) and compute the result. Here are the values for n = 2, 3, 4, and 5:
For n = 2: (1 + 1/2) = 1.5
For n = 3: (1 + 1/2) * (1 + 1/3) ≈ 1.83
For n = 4: (1 + 1/2) * (1 + 1/3) * (1 + 1/4) ≈ 2.08
For n = 5: (1 + 1/2) * (1 + 1/3) * (1 + 1/4) * (1 + 1/5) ≈ 2.28
Based on these values, we can observe that the product seems to be approaching a specific value as n increases.
The values of the product are getting closer to the conjectured formula (1 + 1/n).
Therefore, we can conjecture that the general formula for the product is (1 + 1/n), where n represents the number of terms in the product.
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CITY PLANNING A city is planning to construct a new park.
Based on the blueprints, the park is the shape of an isosceles
triangle. If
represents the base of the triangle and
4x²+27x-7 represents the height, write and simplify an
3x²+23x+14
expression that represents the area of the park.
3x²-10x-8
4x²+19x-5
The expression that represents the area of the park is (1/2) * (x-4)/(x+5).
How to find the expression that represents the area of the park?We shall first find the area of a triangle, using the formula:
Area = (1/2) * base * height
Given:
The base of the triangle is represented by the expression: (3x²-10x-8)/(4x²+19x-5)
The height is represented by: (4x²+27x-7)/(3x²+23x+14)
Then, put the values into the formula to find the expression:
Area = (1/2) * [(3x²-10x-8)/(4x²+19x-5)] * [(4x²+27x-7)/(3x²+23x+14)]
We first simplify each of the fractions:
Area = (1/2) * [(3x²-10x-8)/(4x²+19x-5)] * [(4x²+27x-7)/(3x²+23x+14)]
= (1/2) * [(3x²-10x-8)/(4x²+19x-5)] * [(4x²+27x-7)/(3x²+23x+14)]
= (1/2) * [(3x²-10x-8)/(4x²+19x-5)] * [(4x²+27x-7)/(3x²+23x+14)]
Next, factorize the quadratic expressions in the numerator and denominator:
Area = (1/2) * [(3x+2)(x-4)/(4x-1)(x+5)] * [(4x-1)(x+7)/(3x+2)(x+7)]
= (1/2) * [(3x+2)(x-4)(4x-1)(x+7)] / [(4x-1)(x+5)(3x+2)(x+7)]
Then, cancel the common factors between the numerator and the denominator:
In the numerator, we have (3x+2), (4x-1), and (x+7), and in the denominator, we also have (4x-1), (3x+2), and (x+7).
Area = (1/2) * (x-4)/(x+5)
Therefore, the simplified expression that represents the area of the park is (1/2) * (x-4)/(x+5).
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f(x+4x)-S (X) Evaluate lim Ax-+0 for the function f(x) = 2x - 5. Show the work and simplification ΔΥ Find the value of "a" and "b" for which the limit exists both as x approaches 1 and as x approach
The limits approach different finite values as x approaches the same value in the domain. Hence the given limit doesn't exist.
Given f(x) = 2x - 5.
We need to evaluate lim Ax-+0 for the function f(x+4x)-S (X).
Also, we need to find the value of "a" and "b" for which the limit exists both as x approaches 1 and as x approaches $\frac{1}{2}$ .
Solution: Given function is f(x+4x)-S (X)
Now, f(x+4x) = 2(x+4x)-5 = 10x-5Also, S(X) = x + 4 + 1/x
Take the limit as Ax-+0lim 10x-5 - x - 4 - 1/x
We know that as x approaches 0, 1/x will tend to infinity and hence limit will be infinity as well.
Therefore, the given limit doesn't exist.
As we know, $f(x)=2x-5$ and we have to find the value of "a" and "b" for which the limit exists both as x approaches 1 and as x approaches $\frac{1}{2}$ .
Therefore, we have to find the values of a and b such that f(1) and f($\frac{1}{2}$) are finite and equal when evaluated at the same limit.
So, for x = 1;
f(x) = 2(1)-5
= -3And for
x = $\frac{1}{2}$;
f(x) = 2($\frac{1}{2}$) - 5 = -4
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Use algebraic techniques to rewrite y = x*(-5x: - 8x2 + 7) as a sum or difference; then find y'. Answer 5 Points y =
The derivative of y with respect to x, y', is -24x^2 - 10x + 7.as a sum or difference; then find y'
To rewrite the equation [tex]y = x*(-5x - 8x^2 + 7)[/tex] as a sum or difference, we can distribute the x term to each of the terms inside the parentheses:
[tex]y = -5x^2 - 8x^3 + 7x[/tex]
Now, we can see that the equation can be expressed as a sum of three terms:
[tex]y = -5x^2 + (-8x^3) + 7x[/tex]
We have separated the terms and expressed the equation as a sum.
To find y', the derivative of y with respect to x, we differentiate each term separately using the power rule of differentiation.
The derivative of[tex]-5x^2[/tex] with respect to x is -10x, as the coefficient -5 is brought down and multiplied by the power 2, resulting in -10x.
The derivative of[tex]-8x^3[/tex] with respect to x is[tex]-24x^2[/tex], as the coefficient -8 is brought down and multiplied by the power 3, resulting in[tex]-24x^2.[/tex]
The derivative of 7x with respect to x is 7, as the coefficient 7 is a constant, and the derivative of a constant with respect to x is 0.
Putting it all together, we have:
[tex]y' = -10x + (-24x^2) + 7[/tex]
Simplifying further, we get:
[tex]y' = -24x^2 - 10x + 7[/tex]
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Suppose that f(t)=t^2+3t-7. What is the average rate of change off(t) over the interval 5 to 6? What is the instantaneous rate ofchange of f(t) when t=5?
The average rate of change of f(t) over the interval 5 to 6 is 14.
to find the average rate of change of f(t) over the interval 5 to 6, we can use the formula:
average rate of change = (f(b) - f(a)) / (b - a)
where a and b are the endpoints of the interval.
given f(t) = t² + 3t - 7, and the interval is from 5 to 6, we have:
a = 5b = 6
substituting these values into the formula, we get:
average rate of change = (f(6) - f(5)) / (6 - 5)
calculating f(6):f(6) = (6)² + 3(6) - 7
= 36 + 18 - 7 = 47
calculating f(5):
f(5) = (5)² + 3(5) - 7 = 25 + 15 - 7
= 33
substituting these values into the formula:average rate of change = (47 - 33) / (6 - 5)
= 14 / 1 = 14 to find the instantaneous rate of change of f(t) when t = 5, we can calculate the derivative of f(t) with respect to t, and then evaluate it at t = 5.
given f(t) = t² + 3t - 7, we can find the derivative f'(t) as follows:
f'(t) = 2t + 3
to find the instantaneous rate of change at t = 5, we substitute t = 5 into f'(t):
f'(5) = 2(5) + 3
= 10 + 3 = 13
, the instantaneous rate of change of f(t) when t = 5 is 13.
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if the positive integer x leaves a remainder of 2 when divided by 8, what will the remainder be when x 9 is divided by 8?
The remainder when a positive integer x leaves a remainder of 2 when divided by 8 and x+9 is divided by 8 is 5.
If the positive integer x leaves a remainder of 2 when divided by 8, then we can say that x = 8k + 2, where k is an integer.
Now, if we divide x+9 by 8, we get:
(x+9)/8 = (8k + 2 + 9)/8
= (8k + 11)/8
= k + (11/8)
So, the remainder when x+9 is divided by 8 is 11/8. However, since we are dealing with integers, the remainder can only be a whole number between 0 and 7.
Therefore, we need to subtract the quotient (k) from the expression above and multiply the resulting decimal by 8 to get the remainder:
Remainder = (11/8 - k) x 8
Since k is an integer, the only possible values for (11/8 - k) are -3/8, 5/8, 13/8, etc. The closest whole number to 5/8 is 1, so we can say that:
Remainder = (11/8 - k) x 8 ≈ (5/8) x 8 = 5
Therefore, the remainder when x+9 is divided by 8 is 5.
If a positive integer x leaves a remainder of 2 when divided by 8, then x can be expressed as 8k + 2, where k is an integer. To find the remainder when x+9 is divided by 8, we divide x+9 by 8 and subtract the quotient from the decimal part. The resulting decimal multiplied by 8 gives us the remainder. In this case, the decimal is 11/8, which is closest to 1. Thus, we subtract the quotient k from 11/8 and multiply the result by 8 to get the remainder of 5.
The remainder when a positive integer x leaves a remainder of 2 when divided by 8 and x+9 is divided by 8 is 5.
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A manufacturing company produces to models oven HDTV per week X units of model A and units of model B with a cost(in dollars) given by
the following function. A manufacturing company produces two models of an HDTV per week, x units of model A and y units of model with a cost (in dollars) given by the following function C(x,y) = 15x + 30y? If it is necessary (because of shipping considerations) that X + y = 90 how many of each type of sec should be manufactured per week in order to minimize cost? What is the minimum cost?
The minimum cost is $2,700, and it can be achieved by manufacturing 0 units of model A and 90 units of model B per week.
How to solve for the minimum costTo minimize the cost function C(x, y) = 15x + 30y, subject to the constraint x + y = 90, we can use the method of Lagrange multipliers.
Let's define the Lagrangian function L(x, y, λ) as follows:
L(x, y, λ) = C(x, y) + λ(x + y - 90)
where λ is the Lagrange multiplier.
To find the minimum cost, we need to find the values of x, y, and λ that satisfy the following conditions:
∂L/∂x = 15 + λ = 0
∂L/∂y = 30 + λ = 0
∂L/∂λ = x + y - 90 = 0
From the first two equations, we can solve for λ:
15 + λ = 0 -> λ = -15
30 + λ = 0 -> λ = -30
Since these two values of λ are different, we know that x and y will also be different in the two cases.
For λ = -15:
15 + (-15) = 0 -> x = 0
For λ = -30:
15 + (-30) = 0 -> y = 15
So, we have two possible solutions:
Solution 1: x = 0, y = 90
Solution 2: x = 15, y = 75
To determine which solution gives the minimum cost, we substitute the values of x and y into the cost function:
For Solution 1:
C(x, y) = C(0, 90) = 15(0) + 30(90) = 2700
For Solution 2:
C(x, y) = C(15, 75) = 15(15) + 30(75) = 2925
Therefore, the minimum cost is $2,700, and it can be achieved by manufacturing 0 units of model A and 90 units of model B per week.
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dy 1/ 13 Find if y=x dx dy II dx (Type an exact answer.)
To find dy/dx if y = x^(-1/3), we differentiate y with respect to x using the power rule. The derivative is dy/dx = -1/3 * x^(-4/3).
Given y = x^(-1/3), we can find dy/dx by differentiating y with respect to x. Applying the power rule, the derivative of x^n is n * x^(n-1), where n is a constant. In this case, n = -1/3, so the derivative of y = x^(-1/3) is dy/dx = (-1/3) * x^(-1/3 - 1) = (-1/3) * x^(-4/3). Therefore, the derivative dy/dx of y = x^(-1/3) is -1/3 * x^(-4/3). The power rule for differentiation is used to differentiate algebraic expressions with power, that is if the algebraic expression is of form xn, where n is a real number, then we use the power rule to differentiate it. Using this rule, the derivative of xn is written as the power multiplied by the expression and we reduce the power by 1. So, the derivative of xn is written as nxn-1. This implies the power rule derivative is also used for fractional powers and negative powers along with positive powers.
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Help for a grade help asap if you do thx so much
The area of the given figure is 15.62 square feet which has rectangle and triangle.
The figure is a combined form of the rectangle and triangle.
Let us convert 6 in to feet, which is 0.5 feet.
Now 5 in is 0.42 feet.
Area of rectangle = length × width
=22×0.5
=11 square feet.
Area of triangle is half times of base and height.
Area of triangle =1/2×22×0.42
=11×0.42
=4.62 square feet.
Total area = 11+4.62
=15.62 square feet.
Hence, the area of the given figure is 15.62 square feet.
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need help with A and B
1. Use L'Hospital's rule to evaluate each limit. (5 pts. each) a) lim sin 5x csc 3x b) lim x+x2 X-7001-2x2 x+0
Each limit can be evaluated using L'Hospital's rule as
a. The limit is 5/3.
b. The limit is 1.
a) To evaluate the limit lim(x→0) sin(5x) / csc(3x), we can apply L'Hôpital's rule by taking the derivative of the numerator and denominator separately.
lim(x→0) sin(5x) / csc(3x) = lim(x→0) (5cos(5x)) / (3cos(3x))
Now, plugging in x = 0 gives us:
lim(x→0) (5cos(5x)) / (3cos(3x)) = (5cos(0)) / (3cos(0)) = 5/3
Therefore, the limit is 5/3.
b) For the limit lim(x→0) (x + x^2) / (x - 7001 - 2x^2), we can again use L'Hôpital's rule by taking the derivative of the numerator and denominator.
lim(x→0) (x + x^2) / (x - 7001 - 2x^2) = lim(x→0) (1 + 2x) / (1 - 4x)
Plugging in x = 0 gives us:
lim(x→0) (1 + 2x) / (1 - 4x) = (1 + 2(0)) / (1 - 4(0)) = 1/1 = 1
Therefore, the limit is 1.
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15. The data set shows prices for concert tickets in 10 different cities in Florida. City Price ($) City City Q V R W S X T Y U Z 45 50 35 37 29 Price ($) 36 24 25 27 43 a. Find the IQR of the data set. b. How do prices vary within the middle 50%? D S
The interquartile range is 18 and the prices vary between 26 and 44 within the middle 50% of the data set.
Using the price data given arranged in ascending orde r: 24, 25, 27, 29, 35, 36, 37, 43, 45, 50
The interquartile range (IQR) is expressed as :
IQR = (Upper quartile - Lower quartile) / 2
Upper quartile = 3/4(n+1)th term = 8.25th term
Upper quartile = (43+45)/2 = 44
Lower quartile = 1/4(n+1)th term = 2.75th term
Lower quartile= (25 + 27)/2 = 26
The IQR = Q3 - Q1 = 44 - 26 = 18
Price Variation within the middle 50%Variation within the middle 50% of the data can be analysed by examining the range between the first quartile (Q1) and the third quartile (Q3). In this case, the middle 50% refers to the range of values between Q1 and Q3.
Using the values we calculated earlier:
Q1 = 26
Q3 = 44
The middle 50% of the data set falls within the range of values from 26 to 44. Prices within this range demonstrate the variation in prices within the middle half of the dataset.
Therefore , the interquartile range is 18 and the prices vary between 26 and 44 within the middle 50% of the data set.
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Define R as the region that is bounded by the graph of the function f(x)=−2e^−x, the x-axis, x=0, and x=1. Use the disk method to find the volume of the solid of revolution when R is rotated around the x-axis.
The volume of the solid of revolution formed by rotating region R around the x-axis using disk method is 2π∙[e^-1-1].
Let's have further explanation:
1: Get the equation in the form y=f(x).
f(x)=-2e^-x
2: Draw a graph of the region to be rotated to determine boundaries.
3: Calculate the area of the region R by creating a formula for the area of a general slice at position x.
A=2π∙x∙f(x)=2πx∙-2e^-x
4: Use the disk method to set up an integral to calculate the volume.
V=∫0^1A dx=∫0^1(2πx∙-2e^-x)dx
5: Calculate the integral.
V=2π∙[-xe^-x-e^-x]0^1=2π∙[-e^-1-(-1)]=2π∙[-e^-1+1]
6: Simplify the result.
V=2π∙[e^-1-1]
The volume of the solid of revolution formed by rotating region R around the x-axis is 2π∙[e^-1-1].
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Question 3 Not yet answered Marked out of 5.00 Flag question Question (5 points): The following series is not an alternating series. (-1)2n-1 Σ # Vn2 + 8n Select one: True False Previous page Next pa
True. The assertion is accurate. It cannot be said that the provided series (-1)(2n-1)*(Vn2 + 8n) is an alternating series.
The terms' signs should alternate between positive and negative for the series to be considered alternating. The word (-1)(2n-1) is not alternated in this series, though. The exponent 2n-1 evaluates to an odd number when n is odd, producing a negative term. The exponent, however, evaluates to an even value when n is even, producing a positive term. The series does not fit the criteria of an alternating series since the signs of the terms do not alternate regularly.
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Parametrize the following. Don't forget to include the limits for your parameter(s). (I'm asking you to find parameterizations for the following curves and/or surfaces). (a) The curve which is the intersection of the cylinder x + y2 = 4 and the surface x +y+z=y?. + (b) The surface which is the part of the cylinder x² + y2 = 9 between the planes z=1 and 2=10. (c) The surface which is the part of the sphere of radius 4 which is "behind" the plane x=0 (that is, the part of the sphere of radius 4 in the octants where x < 0) and is above the cone - - 4x + 4y
(a) The curve of intersection between the cylinder [tex]x + y^2 = 4[/tex] and the surface [tex]x + y + z = y^2[/tex] is parametrized as follows: x = 4 - t, y = t, and [tex]z = t^2 - t[/tex].
(b) The surface that lies between the planes z = 1 and z = 10 on the cylinder [tex]x^2 + y^2 = 9[/tex] is parametrized as follows: x = 3cos(t), y = 3sin(t), and z = t, where t varies from 1 to 10.
(c) The surface that represents the part of the sphere with a radius of 4, located in the octants where x < 0 and above the cone -4x + 4y, is parametrized as follows: x = -4cos(t), y = 4sin(t), and [tex]z = \sqrt(16 - x^2 - y^2)[/tex], where t varies from 0 to[tex]2\pi[/tex].
(a) To find the parametrization of the curve of intersection between the given cylinder and surface, we can equate the expressions for[tex]x + y^2[/tex] in both equations and solve for the parameter t. By setting [tex]x + y^2 = 4 - t[/tex] and substituting it into the equation for the surface, we obtain [tex]z = y^2 - y[/tex]. Hence, the parameterization is x = 4 - t, y = t, and [tex]z = t^2 - t[/tex].
(b) The given surface lies between the planes z = 1 and z = 10 on the cylinder [tex]x^2 + y^2 = 9[/tex]. We can parametrize this surface by considering the cylinder's circular cross-sections along the z-axis. Using polar coordinates, we let x = 3cos(t) and y = 3sin(t) to represent points on the circular cross-section. Since the surface extends from z = 1 to z = 10, we can take z as the parameter itself. Thus, the parametrization is x = 3cos(t), y = 3sin(t), and z = t, where t varies from 1 to 10.
(c) To parametrize the surface representing the part of the sphere with a radius of 4 in the specified octants and above the given cone, we can use spherical coordinates. In this case, since x < 0, we can set x = -4cos(t) and y = 4sin(t) to define points on the surface. To determine z, we use the equation of the sphere, [tex]x^2 + y^2 + z^2 = 16[/tex], and solve for z in terms of x and y.
By substituting the expressions for x and y, we find [tex]z = \sqrt(16 - x^2 - y^2)[/tex]. Therefore, the parametrization is x = -4cos(t), y = 4sin(t), and [tex]z = \sqrt(16 - x^2 - y^2)[/tex], where t varies from 0 to [tex]2\pi[/tex].
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MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Consider the following demand equation. x = (-2)p +22 Let x = f(p), with price p. Find f'(p). f'p) 7. 4 Great job. Find the elasticity of demand, E(p). E(P)
1. The value of f'(p).f'(p) = 4
2. The elasticity of demand is 2p / (2p - 22)
What is the elasticity of demand?To find f'(p), the derivative of the demand function x = (-2)p + 22 with respect to p, we differentiate the equation with respect to p:
f'(p) = d/dp [(-2)p + 22]
The derivative of -2p with respect to p is -2, since the derivative of p is 1.
The derivative of 22 with respect to p is 0, since it is a constant.
Therefore, f'(p) = -2.
Hence, f'(p).f'(p) = -2 * -2 = 4
The elasticity of demand is dependent to quantity changes in price.
E(p) = (f'(p) * p) / f(p)
Plugging the values;
E(p) = (-2 * p) / ((-2) * p + 22)
Simplifying this;
E(p) = -2p / (-2p + 22)
E(p) = 2p / (2p - 22)
Therefore, the elasticity of demand, E(p), is given by 2p / (2p - 22).
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only need h
C се 2. Verify that the function is a solution of the differential equation on some interval, for any choice of the arbitrary constants appearing in the function. (a) y = ce2x. y' = 2y x2 (b) y = 3
1) The equation holds true for all values of x, indicating that y = ce^(2x) is indeed a solution of the differential equation y' = 2yx^2.
2) y = 3 is not a solution of the differential equation y' = 2yx^2.
What is Constant?
A variety that expresses the connection between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.
For an equilibrium equation aA + bB ⇌ cC + dD, the equilibrium constant, can be found using the formula K = [C]c[D]d / [A]a[B]b , where K is a constant.
To verify whether the function y = ce^(2x) is a solution of the differential equation y' = 2yx^2, we need to differentiate y with respect to x and then substitute it into the differential equation to see if the equation holds.
(a) Let's differentiate y = ce^(2x) with respect to x:
y' = (d/dx)(ce^(2x))
Using the chain rule of differentiation, we get:
y' = 2ce^(2x)
Now let's substitute y' and y into the given differential equation:
2ce^(2x) = 2y*x^2
Substituting y = ce^(2x), we have:
2ce^(2x) = 2(ce^(2x)) * x^2
Simplifying the equation:
2ce^(2x) = 2ce^(2x) * x^2
Dividing both sides by 2ce^(2x), we get:
1 = x^2
The equation holds true for all values of x, indicating that y = ce^(2x) is indeed a solution of the differential equation y' = 2yx^2.
(b) Let's consider the function y = 3. In this case, y is a constant, so y' = 0.
Substituting y = 3 into the given differential equation:
0 = 2(3)x^2
Simplifying the equation:
0 = 6x^2
The equation is not satisfied for any non-zero value of x. Therefore, y = 3 is not a solution of the differential equation y' = 2yx^2.
In conclusion, the function y = ce^(2x) is a solution of the given differential equation on any interval, for any choice of the arbitrary constant c. However, the constant function y = 3 is not a solution to the differential equation.
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5. Determine the intervals of increasing and decreasing in: y = -x +2sinx + 2cosx +In(sinx) in the interval [0.2TT). (4 marks)
The intervals of increasing are: - π/2 < x < π/2 + 2kπ, where k is an integer, The intervals of decreasing are: - 0 < x < π/2, - π/2 + 2kπ < x < π + 2kπ, where k is an integer.
To determine the intervals of increasing
and decreasing, we need to analyze the first derivative of the function. Taking the derivative of y with respect to x, we get:
dy/dx = -1 + 2cos(x) - 2sin(x)/sin(x) + cot(x)
Simplifying further, we have:
dy/dx = -1 + 2cos(x) - 2cot(x) + cot(x)
= -1 + 2cos(x) - cot(x)
To find the critical points, we set dy/dx = 0:
-1 + 2cos(x) - cot(x) = 0
Simplifying the equation, we obtain:
2cos(x) - cot(x) = 1
By analyzing the trigonometric functions, we determine that the equation holds true for values of x in the intervals mentioned earlier.
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Determine the general solution: 4th order linear homogenous differential equation for the y(x) with real coefficients given that two of its 2x particular solutions are 6x*e and 3e =* 2-X"
the general solution of the differential equation is [tex]y(x) = C1e^{m1x} + C2e^{m2x} + C3e^{m3x} + C4e^{m4x}[/tex] with real coefficients.
Given two particular solutions of a 4th order linear homogeneous differential equation are:
[tex]y1(x) = 6xe^{2x} and y2(x) = 3e^{-2x}[/tex]
From the given equation, it can be written as: [tex]a4(d^4y/dx^4) + a3(d^3y/dx^3) + a2(d^2y/dx^2) + a1(dy/dx) + a0y = 0[/tex]
where a4, a3, a2, a1, a0 are the real constants.
Since the differential equation is linear and homogeneous, its general solution can be obtained by solving the characteristic equation as follows:
[tex]a4m^4 + a3m^3 + a2m^2 + a1m + a0 = 0[/tex]
The characteristic equation for the given differential equation is:
[tex]m^4 + (a3/a4)m^3 + (a2/a4)m^2 + (a1/a4)m + (a0/a4) = 0[/tex]
Letting [tex]y(x) = e^{mx}[/tex], we get the characteristic equation as:
[tex]m^4 + (a3/a4)m^3 + (a2/a4)m^2 + (a1/a4)m + (a0/a4) = 0[/tex]
On substituting the particular solution [tex]y1(x) = 6xe^{2x}[/tex] in the differential equation, we get:
[tex]a4(2^4)(6x) + a3(2^3)(6) + a2(2^2)(6) + a1(2)(6) + a0(6) = 0[/tex]
On substituting the particular solution [tex]y2(x) = 3e^{-2x}[/tex] in the differential equation, we get:
[tex]a4(-2^4)(3) + a3(-2^3)(3) + a2(-2^2)(3) + a1(-2)(3) + a0(3) = 0[/tex]
Simplifying the above two equations, we get: a4 + 6a3 + 12a2 + 8a1 + a0 = 0..(1)
16a4 - 8a3 + 4a2 - 2a1 + a0 = 0..(2)
By solving the above two equations, we can get the values of a0, a1, a2, a3, a4.
To obtain the general solution, let's assume that [tex]y(x) = e^{mx}[/tex] is the solution of the differential equation.
Therefore, the general solution of the differential equation can be written as:
[tex]y(x) = C1e^{m1x} + C2e^{m2x} + C3e^{m3x} + C4e^{m4x}[/tex] where C1, C2, C3, C4 are arbitrary constants and m1, m2, m3, m4 are the roots of the characteristic equation [tex]m^4 + (a3/a4)m^3 + (a2/a4)m^2 + (a1/a4)m + (a0/a4) = 0[/tex].
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Find constants a and b such that the graph of f(x) = x3 + ax2 + bx will have a local max at (-2, 9) and a local min at (1,7).
The constants [tex]\(a\) and \(b\) are \(a = \frac{3}{2}\) and \(b = -6\).[/tex]
How to find [tex]\(a\) and \(b\)[/tex] for local extrema?To find the constants \(a\) and \(b\) such that the graph of [tex]\(f(x) = x^3 + ax^2 + bx\)[/tex] has a local maximum at (-2, 9) and a local minimum at (1, 7), we need to set up a system of equations using the properties of local extrema.
1. Local Maximum at (-2, 9):
At the local maximum point (-2, 9), the derivative of [tex]\(f(x)\)[/tex] should be zero, and the second derivative should be negative.
First, let's find the derivative of [tex]\(f(x)\):[/tex]
[tex]\[f'(x) = 3x^2 + 2ax + b\][/tex]
Now, let's substitute [tex]\(x = -2\)[/tex] and set the derivative equal to zero:
[tex]\[0 = 3(-2)^2 + 2a(-2) + b\][/tex]
[tex]\[0 = 12 - 4a + b \quad \text{(Equation 1)}\][/tex]
Next, let's find the second derivative of[tex]\(f(x)\):[/tex]
[tex]\[f''(x) = 6x + 2a\][/tex]
Now, substitute [tex]\(x = -2\)[/tex] [tex]\[f''(-2) = 6(-2) + 2a < 0\][/tex] and ensure that the second derivative is negative:
[tex]\[f''(-2) = 6(-2) + 2a < 0\]\[-12 + 2a < 0\]\[2a < 12\]\[a < 6\][/tex]
2. Local Minimum at (1, 7):
At the local minimum point (1, 7), the derivative of [tex]\(f(x)\)[/tex] should be zero, and the second derivative should be positive.
Using the derivative of [tex]\(f(x)\)[/tex] from above:
[tex]\[f'(x) = 3x^2 + 2ax + b\][/tex]
Now, let's substitute [tex]\(x = 1\)[/tex] and set the derivative equal to zero:
[tex]\[0 = 3(1)^2 + 2a(1) + b\]\[0 = 3 + 2a + b \quad \text{(Equation 2)}\][/tex]
Next, let's find the second derivative of[tex]\(f(x)\):[/tex]
[tex]\[f''(x) = 6x + 2a\][/tex]
Now, substitute[tex]\(x = 1\) \\[/tex] and ensure that the second derivative is positive:
[tex]\[f''(1) = 6(1) + 2a > 0\]\[6 + 2a > 0\]\[2a > -6\]\[a > -3\][/tex]
To summarize, we have the following conditions:
[tex]Equation 1: \(0 = 12 - 4a + b\)Equation 2: \(0 = 3 + 2a + b\)[/tex]
[tex]\(a < 6\) (to satisfy the local maximum condition)\(a > -3\) (to satisfy the local minimum condition)[/tex]
Now, let's solve the system of equations to find the values of a and b
From Equation 1, we can express b in terms of a:
[tex]\[b = 4a - 12\][/tex]
Substituting this expression for b into Equation 2, we get:
[tex]\[0 = 3 + 2a + (4a - 12)\]\[0 = 6a - 9\]\[6a = 9\]\[a = \frac{9}{6} = \frac{3}{2}\][/tex]
Substituting the value of \(a\) back into Equation 1, we can find b
[tex]\[0 = 12 - 4\left(\frac{3}{2}\right) + b\]\[0 = 12 - 6 + b\]\[b = -6\][/tex]
Therefore, the constants a and b that satisfy the given conditions are[tex]\(a = \frac{3}{2}\) and \(b = -6\).[/tex]
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Given the vectors v and u, answer a. through d. below. v=6i +3j - 2k u=7i+24j a. Find the dot product of v and u. U V = 114 Find the length of v. |v|= (Simplify your answer. Type an exact answer, usin
The dot product of the given vectors in the question v = 6i + 3j - 2k and u = 7i + 24j is 114 and the length of vector v = 6i + 3j - 2k is [tex]\sqrt{49 + 9 + 4} = \sqrt{62}[/tex].
The dot product (also known as the scalar product) of two vectors v and u is calculated by multiplying the corresponding components of the vectors and summing the results. For the given vectors:
v = 6i + 3j - 2k
u = 7i + 24j
The dot product of v and u, denoted as v · u, is given by:
v · u = (6)(7) + (3)(24) + (-2)(0) = 42 + 72 + 0 = 114
Therefore, the dot product of v and u is 114.
The length of a vector is determined using the formula:
[tex]|v| = \sqrt{v_1^2 + v_2^2 + v_3^2}[/tex]
Where [tex]v_1[/tex], [tex]v_2[/tex], and [tex]v_3[/tex] are the components of the vector. For vector v = 6i + 3j - 2k, the length is:
[tex]|v| = \sqrt{(6^2 + 3^2 + (-2)^2) }= \sqrt{(36 + 9 + 4)} = \sqrt{49 + 9 + 4} = \sqrt{62}[/tex]
Therefore, the length of vector v is [tex]\sqrt{62}[/tex].
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with details
d) Determine whether the vector field is conservative. If it is, find a potential function for the vector field F(x, y, z) = y 1+2xyz'; +3ry 2+k e) Find the divergence of the vector field at the given
The mixed partial derivatives are not equal, the vector field F is not conservative, and there is no potential function for this vector field and the divergence of the vector field F is 2y^2z + 6ry.
To determine whether the vector field F(x, y, z) = y(1 + 2xyz)i + 3ry^2j + kz is conservative, we need to check if it satisfies the condition of the gradient vector field. If it does, then there exists a potential function for the vector field.
First, we compute the partial derivatives of each component of F with respect to the corresponding variable:
∂/∂x (y(1 + 2xyz)) = 2y^2z
∂/∂y (3ry^2) = 6ry
∂/∂z (k) = 0
The next step is to check if the mixed partial derivatives are equal:
∂/∂y (2y^2z) = 4yz
∂/∂x (6ry) = 0
∂/∂z (2y^2z) = 2y^2
Since the mixed partial derivatives are not equal, the vector field F is not conservative, and there is no potential function for this vector field.
For the divergence of the vector field, we compute the divergence as follows:
div(F) = ∂/∂x (y(1 + 2xyz)) + ∂/∂y (3ry^2) + ∂/∂z (k)
= 2y^2z + 6ry
Therefore, the divergence of the vector field F is 2y^2z + 6ry.
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1. Use the following table to estimate the area between f(x) and the x-axis on the interval 75x27. You need to use Reimann sum (Calculate both side). x 7 f(x) 20 NE 12 23 17 25 22 21 27 17 2. Use an
The estimated area between f(x) and the x-axis on the interval 7 ≤ x ≤ 27 using the left Riemann sum is 320, and using the right Riemann sum is 295.
To estimate the area between f(x) and the x-axis on the interval 7 ≤ x ≤ 27 using a Riemann sum, we need to divide the interval into smaller subintervals and approximate the area under the curve using rectangles.
1. To calculate the left Riemann sum, we use the height of the function at the left endpoint of each subinterval.
Subinterval (xi, xi+1) Width (Δx) Height (f(xi)) Area (Δx*f(xi))
(7,12) 5 20 100
(12,17) 5 23 115
(17,22) 5 NE NE
(22,27) 5 21 105
Total Area = 320
Note: We cannot calculate the height for the third subinterval because the function value is missing (NE).
2. To calculate the right Riemann sum, we use the height of the function at the right endpoint of each subinterval.
Subinterval (xi, xi+1) Width (Δx) Height (f(xi+1)) Area (Δx*f(xi+1))
(7,12) 5 NE NE
(12,17) 5 17 85
(17,22) 5 25 125
(22,27) 5 17 85
Total Area = 295
Note: We cannot calculate the height for the first subinterval because the function value is missing (NE).
Therefore, the estimated area between f(x) and the x-axis on the interval 7 ≤ x ≤ 27 using the left Riemann sum is 320, and using the right Riemann sum is 295.
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For the position function r(t) = ( = t 5/2, t), 2 5 compute its length of arc over the interval [0, 2].
The length of arc of r(t) over [0,2] is (16/3)√10 - 4√3. To find the length of arc of the position function r(t) = (t^(5/2), t) over the interval [0, 2], we need to use the arc length formula:
L = ∫[a,b] √[dx/dt]^2 + [dy/dt]^2 dt
where a = 0 and b = 2. We have:
dx/dt = (5/2)t^(3/2) and dy/dt = 1
Substituting these values into the formula, we get:
L = ∫[0,2] √[(5/2)t^(3/2)]^2 + 1^2 dt
= ∫[0,2] √(25/4)t^3 + 1 dt
= ∫[0,2] √(t^6 + 4t^3 + 4 - 4) dt (adding and subtracting 4t^3 + 4 inside the square root)
= ∫[0,2] √(t^3 + 2)^2 - 4 dt (using (a+b)^2 = a^2 + 2ab + b^2)
= ∫[0,2] t^3 + 2 - 2√(t^3 + 2) dt (integrating and simplifying)
Evaluating this integral over the interval [0,2] gives:
L = [(1/4)t^4 + 2t - (4/3)(t^3 + 2)√(t^3 + 2)]_0^2
= (16/3)√10 - 4√3
Therefore, the length of arc of r(t) over [0,2] is (16/3)√10 - 4√3.
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in a certain card​ game, the probability that a player is dealt a particular hand is . explain what this probability means. if you play this card game 100​ times, will you be dealt this hand exactly ​times? why or why​ not?
A probability of 0.48 means that there is a 48% chance that a player will be dealt a particular hand in the card game.
If you play the card game 100 times, it may not be possible that you will be dealt this particular hand exactly 48 times because theoretical probability differs from experimental probability.
What is probability?The concept of probability deals with the likelihood of an event occurring, but it does not guarantee the occurrence of that event in every individual trial.
While the expected value is that you will be dealt this hand around 48 times out of 100 games, the actual results can differ due to the random nature of the card shuffling process. You could be dealt the hand more or fewer times in any given set of 100 games.
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Complete question:
In a certain card game, the probability that a player is dealt a particular hand is 0.48. Explain what this probability means. If you play this card game 100 times, will you be dealt this hand exactly 48 times? Why or why not?
In a certain card game, the probability of being dealt a particular hand represents the likelihood of receiving that specific hand out of all possible combinations.
The probability of being dealt a particular hand in a card game indicates the chance of receiving that specific hand out of all possible combinations. It is a measure of how likely it is for the player to get that specific combination of cards. The probability is typically expressed as a fraction, decimal, or percentage.
However, when playing the card game 100 times, it is highly unlikely that the player will be dealt the same hand exactly the same number of times. This is because the card shuffling and dealing process in the game is usually random. Each time the cards are shuffled, the order and distribution of the cards change, leading to different hands being dealt. The probability remains the same for each individual game, but the actual outcomes may vary.
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Find the derivative of the function. y- 6x-7 8x+5 The derivative is y
The derivative of the function y = 6x^2 - 7x + 8x + 5 is y' = 12x + 1.
To find the derivative of the function y = 6x^2 - 7x + 8x + 5, we differentiate each term of the function separately using the power rule of differentiation.
The power rule states that if we have a term of the form ax^n, the derivative with respect to x is given by nx^(n-1).
Differentiating each term:
d/dx (6x^2) = 12x^(2-1) = 12x
d/dx (-7x) = -7
d/dx (8x) = 8
d/dx (5) = 0 (the derivative of a constant is zero)
Now, combining the derivatives, we get:
y' = 12x - 7 + 8
Simplifying, we have:
y' = 12x + 1
Therefore, the derivative of the function y = 6x^2 - 7x + 8x + 5 is y' = 12x + 1.
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I got the answer to f(x). But I can't figure out the
answer to f(1).
If f(x) = 7 sin : + 8 cos x, then 7 cos( x ) - 8 sin(x) f'(1) - 7 cos( x ) - 8 sin ( 2 )
The value of f(1) is 7 cos(1) - 8 sin(1). Given the function f(x) = 7 sin(x) + 8 cos(x), we want to find the value of f(1).
To do so, we substitute x = 1 into the function. Plugging in x = 1, we have f(1) = 7 sin(1) + 8 cos(1). This simplifies to f(1) = 7 cos(1) - 8 sin(1) using the trigonometric identity sin(a) = cos(a - π/2). Thus, the value of f(1) is 7 cos(1) - 8 sin(1). It is important to note that the given expression f'(1) - 7 cos(x) - 8 sin(2) is unrelated to finding the value of f(1) and appears to be a separate expression or equation.
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For what value of a does the function g(x) = xel-1 attain its absolute maximum 를 on the interval (0,5) ?
The value of "a" that makes g(x) attain its absolute maximum on the interval (0,5) is a = l - 1.
To find the value of "a" for which the function g(x) = xel-1 attains its absolute maximum on the interval (0,5), we can use the first derivative test.
First, let's find the derivative of g(x) with respect to x. Using the product rule and the chain rule, we have:
g'(x) = el-1 * (1 * x + x * 0) = el-1 * x
To find the critical points, we set g'(x) = 0:
el-1 * x = 0
Since el-1 is always positive and nonzero, the critical point occurs at x = 0.
Next, we need to check the endpoints of the interval (0,5).
When x = 0, g(x) = 0 * el-1 = 0.
When x = 5, g(x) = 5 * el-1.
Since el-1 is positive for any value of l, g(x) will be positive for x > 0.
Therefore, the absolute maximum of g(x) occurs at x = 5, and to find the value of "a" for this maximum, we substitute x = 5 into g(x):
g(5) = 5 * el-1 = 5e(l-1)
So, the value of "a" that makes g(x) attain its absolute maximum on the interval (0,5) is a = l - 1.
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Question 2 < > 0/4 The 1906 San Francisco earthquake had a magnitude of 7.9 on the MMS scale. Around the same time there was an earthquake in South America with magnitude 5 that caused only minor dama
The magnitude of the 1906 San Francisco earthquake was 7.9 on the MMS scale, while the earthquake in South America had a magnitude of 5 and caused only minor damage.
The 1906 San Francisco earthquake had a magnitude of 7.9 on the MMS scale. Around the same time there was an earthquake in South America with magnitude 5 that caused only minor damage.
What is magnitude?
Magnitude is a quantitative measure of the size of an earthquake, typically a Richter scale or a moment magnitude scale (MMS).Magnitude and intensity are two terms used to describe an earthquake. Magnitude refers to the energy released by an earthquake, whereas intensity refers to the earthquake's effect on people and structures.A 7.9 magnitude earthquake would cause much more damage than a 5 magnitude earthquake. The magnitude of an earthquake is determined by the amount of energy released during the event. The larger the amount of energy, the higher the magnitude.
The amount of shaking produced by an earthquake is determined by its magnitude. The higher the magnitude, the more severe the shaking and potential damage.
In conclusion, the magnitude of the 1906 San Francisco earthquake was 7.9 on the MMS scale, while the earthquake in South America had a magnitude of 5 and caused only minor damage.
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Que f(x+h)-f(x) Compute the difference quotient, for the function f(x) = 5x², and simplify. h f(x+h) -f(x) h (Simplify your answer.)
Answer:
[tex]f'(x)=10x[/tex]
Step-by-step explanation:
[tex]\displaystyle f'(x)=\lim_{h\rightarrow0}\frac{f(x+h)-f(x)}{h}\\\\f'(x)=\lim_{h\rightarrow0}\frac{5(x+h)^2-5x^2}{h}\\\\f'(x)=\lim_{h\rightarrow0}\frac{5(x^2+2xh+h^2)-5x^2}{h}\\\\f'(x)=\lim_{h\rightarrow0}\frac{5x^2+10xh+5h^2-5x^2}{h}\\\\f'(x)=\lim_{h\rightarrow0}\frac{10xh+5h^2}{h}\\\\f'(x)=\lim_{h\rightarrow0}10x+5h\\\\f'(x)=10x+5(0)\\\\f'(x)=10x[/tex]
1) Find the first 4 partial sums of the series E-15()-¹ (10 points) Show the results of the fraction arithmetic, not decimal approximations.
The series [tex]\sum_{n=1}^{\infty}5(\frac{1}{2})^{n-1}[/tex] can be expressed as a fraction series, and we are asked to find the first four partial sums and the first four partial sums are [tex]\frac{1}{1}, \frac{3}{2}, \frac{11}{6}, \frac{25}{12}[/tex].
The given series [tex]\sum_{n=1}^{\infty}5(\frac{1}{2})^{n-1}[/tex] can be written as [tex]\frac{1}{1}, \frac{1}{2}, \frac{1}{3}, \frac{1}{4} +...[/tex]. The partial sums of this series involve adding the terms up to a certain index. The first partial sum is simply the first term, which is 1. The second partial sum involves adding the first two terms: [tex]\frac{1}{1} +\frac{1}{2}[/tex]. To add these fractions, we need a common denominator, which is 2 in this case. Adding the numerators, we get 2 + 1 = 3, so the second partial sum is [tex]\frac{3}{2}[/tex].
The third partial sum is obtained by adding the first three terms: [tex]\frac{1}{1} +\frac{1}{2} +\frac{1}{3}[/tex]. Again, we need a common denominator of 6 to add the fractions. Adding the numerators, we get 6 + 3 + 2 = 11, so the third partial sum is [tex]\frac{11}{6}[/tex]. Continuing the pattern, the fourth partial sum involves adding the first four terms: [tex]\frac{1}{1} +\frac{1}{2} +\frac{1}{3} +\frac{1}{4}[/tex]. We find a common denominator of 12 and add the numerators, which gives us 12 + 6 + 4 + 3 = 25. Therefore, the fourth partial sum is [tex]\frac{25}{12}[/tex]. Thus, the first four partial sums of the series [tex]\sum_{n=1}^{\infty}5(\frac{1}{2})^{n-1}[/tex] are [tex]\frac{1}{1}, \frac{3}{2}, \frac{11}{6}, \frac{25}{12}[/tex] respectively.
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