Explanation Given information: lim b → ∞ b e − b = 0 Formula used: 1. Quotient rule of differentiation : d d x [ f ( x ) g ( x ) ] = g ( x ) f ' ( x ) − f ( x ) g ' ( x ) [ g ( x ) ] 2 2. The rule of Integrationby parts: f ' ( x ) can be calculated by differentiating f ( x ) and G ( x ) can be calculated by integrating g ( x ) , then ∫ f ( x ) g ( x ) = f ( x ) G ( x ) − ∫ f ' ( x ) G ( x ) d x . Proof: Use integral test to determine the infinite series ∑ k = 1 ∞ k e k is convergent. Integral test: Let f ( x ) be continuous, decreasing, and positive for x ≥ 1 . Then, the infinite series ∑ k = 1 ∞ f ( k ) is convergent if the improper integral ∫ 1 ∞ f ( x ) d x is convergent, and the infinite series is divergent if the improper integral is divergent. Let, f ( x ) = x e x is a positive and continuous for x ≥ 1 . Differentiate f ( x ) = x e x with respect to x by using quotient rule of derivative, it gives ⇒ f ' ( x ) = e x − x e x e 2 x ⇒ f ′ ( x ) = ( 1 − x ) e x So, f ' ( x ) is negative for all x > 1 and hence f ( x ) = x e x is a decreasing for x ≥ 1

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Author: Goldstein

Publisher: PEARSON

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Chapter 11.4, Problem 19E

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To prove: The series ∑k=1∞kek is convergent by using the integral test and the factthat limb→∞ be−b= 0.

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Chapter 11.4, Problem 18E

Chapter 11.4, Problem 20E

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Ch. 11.1 - Determine the third Taylor polynomial of f(x)=cosx...Ch. 11.1 - Prob. 2CYU Ch. 11.1 - Prob. 1E Ch. 11.1 - Prob. 2E Ch. 11.1 - Prob. 3E Ch. 11.1 - Prob. 4E Ch. 11.1 - Prob. 5E Ch. 11.1 - Prob. 6E Ch. 11.1 - Prob. 7E Ch. 11.1 - Prob. 8E

Ch. 11.1 - Prob. 9E Ch. 11.1 - Prob. 10E Ch. 11.1 - Prob. 11E Ch. 11.1 - Prob. 12E Ch. 11.1 - Prob. 13E Ch. 11.1 - Prob. 14E Ch. 11.1 - Prob. 15E Ch. 11.1 - Prob. 16E Ch. 11.1 - Prob. 17E Ch. 11.1 - Prob. 18E Ch. 11.1 - Determine the third and fourthTaylor polynomial...Ch. 11.1 - Prob. 20E Ch. 11.1 - Prob. 21E Ch. 11.1 - Prob. 22E Ch. 11.1 - Prob. 23E Ch. 11.1 - Prob. 24E Ch. 11.1 - Prob. 25E Ch. 11.1 - Prob. 26E Ch. 11.1 - Prob. 27E Ch. 11.1 - Prob. 28E Ch. 11.1 - Prob. 29E Ch. 11.1 - Prob. 30E Ch. 11.1 - Graph the function Y1=11x and its fourth Taylor...Ch. 11.1 - Prob. 32E Ch. 11.1 - Prob. 33E Ch. 11.1 - Prob. 34E Ch. 11.2 - Prob. 1CYU Ch. 11.2 - Prob. 2CYU Ch. 11.2 - In Exercises 18, use three repetitions of the...Ch. 11.2 - In Exercises 18, use three repetitions of the...Ch. 11.2 - Prob. 3E Ch. 11.2 - Prob. 4E Ch. 11.2 - In Exercises 18, use three repetitions of the...Ch. 11.2 - Prob. 6E Ch. 11.2 - Prob. 7E Ch. 11.2 - Prob. 8E Ch. 11.2 - Sketch the graph of y=x3+2x+2, and use the...Ch. 11.2 - Prob. 10E Ch. 11.2 - Prob. 11E Ch. 11.2 - Prob. 12E Ch. 11.2 - Prob. 13E Ch. 11.2 - Internet Rate of Return An investor buys a bond...Ch. 11.2 - Prob. 15E Ch. 11.2 - Prob. 16E Ch. 11.2 - Prob. 17E Ch. 11.2 - Prob. 18E Ch. 11.2 - Prob. 19E Ch. 11.2 - Prob. 20E Ch. 11.2 - Prob. 21E Ch. 11.2 - Figure 9contains the graph of the function...Ch. 11.2 - Prob. 23E Ch. 11.2 - Prob. 24E Ch. 11.2 - Exercises 25 and 26 present two examples in which...Ch. 11.2 - Prob. 26E Ch. 11.2 - Prob. 27E Ch. 11.2 - Prob. 28E Ch. 11.2 - Prob. 29E Ch. 11.2 - Prob. 30E Ch. 11.3 - Determine the sum of the geometric series...Ch. 11.3 - Prob. 2CYU Ch. 11.3 - Determine the sums of the following geometric...Ch. 11.3 - Prob. 2E Ch. 11.3 - Prob. 3E Ch. 11.3 - Determine the sums of the following geometric...Ch. 11.3 - Prob. 5E Ch. 11.3 - Determine the sums of the following geometric...Ch. 11.3 - Prob. 7E Ch. 11.3 - Prob. 8E Ch. 11.3 - Prob. 9E Ch. 11.3 - Prob. 10E Ch. 11.3 - Prob. 11E Ch. 11.3 - Prob. 12E Ch. 11.3 - Prob. 13E Ch. 11.3 - Prob. 14E Ch. 11.3 - Prob. 15E Ch. 11.3 - Sum an appropriate infinite series to find the...Ch. 11.3 - Prob. 17E Ch. 11.3 - Sum an appropriate infinite series to find the...Ch. 11.3 - Prob. 19E Ch. 11.3 - Prob. 20E Ch. 11.3 - Prob. 21E Ch. 11.3 - Prob. 22E Ch. 11.3 - Prob. 23E Ch. 11.3 - The Multiplier Effect Compute the effect of a 20...Ch. 11.3 - Perpetuity Consider a perpetuity that promises to...Ch. 11.3 - Prob. 26E Ch. 11.3 - Bonus plus Taxes on Taxes A generous corporation...Ch. 11.3 - Total Distance Travelled by a Bouncing Ball The...Ch. 11.3 - Elimination of a Drug A patient receives 6 mg of a...Ch. 11.3 - Elimination of a Drug A patient receives 2 mg of a...Ch. 11.3 - Drug Dosage A patient receives M mg of a certain...Ch. 11.3 - Drug Dosage A patient receives M mg of a certain...Ch. 11.3 - Prob. 33E Ch. 11.3 - The infinite series a1+a2+a3+ has partial sums...Ch. 11.3 - Prob. 35E Ch. 11.3 - Prob. 36E Ch. 11.3 - Prob. 37E Ch. 11.3 - Determine the sums of the following infinite...Ch. 11.3 - Prob. 39E Ch. 11.3 - Prob. 40E Ch. 11.3 - Prob. 41E Ch. 11.3 - Prob. 42E Ch. 11.3 - Prob. 43E Ch. 11.3 - Prob. 44E Ch. 11.3 - Prob. 45E Ch. 11.3 - Prob. 46E Ch. 11.3 - Prob. 47E Ch. 11.3 - Prob. 48E Ch. 11.3 - Prob. 49E Ch. 11.3 - In Exercises 49 and 50, convince yourself that the...Ch. 11.4 - What is the improper integral associated with the...Ch. 11.4 - Prob. 2CYU Ch. 11.4 - Prob. 1E Ch. 11.4 - Prob. 2E Ch. 11.4 - Prob. 3E Ch. 11.4 - Prob. 4E Ch. 11.4 - Prob. 5E Ch. 11.4 - Prob. 6E Ch. 11.4 - Prob. 7E Ch. 11.4 - Prob. 8E Ch. 11.4 - Prob. 9E Ch. 11.4 - Prob. 10E Ch. 11.4 - In Exercises 116, use the integral test to...Ch. 11.4 - Prob. 12E Ch. 11.4 - Prob. 13E Ch. 11.4 - Prob. 14E Ch. 11.4 - Prob. 15E Ch. 11.4 - In Exercises 116, use the integral test to...Ch. 11.4 - Prob. 17E Ch. 11.4 - Prob. 18E Ch. 11.4 - Prob. 19E Ch. 11.4 - Prob. 20E Ch. 11.4 - In Excercises 2126, use the comparison test to...Ch. 11.4 - Prob. 22E Ch. 11.4 - Prob. 23E Ch. 11.4 - Prob. 24E Ch. 11.4 - Prob. 25E Ch. 11.4 - Prob. 26E Ch. 11.4 - Prob. 27E Ch. 11.4 - Prob. 28E Ch. 11.4 - Prob. 29E Ch. 11.4 - Prob. 30E Ch. 11.4 - Use Exercise 29 to show that the series...Ch. 11.4 - Use Exercise 30 to show that the series k=13k2 is...Ch. 11.5 - Find the Taylor series expansion of sinx at x=0.Ch. 11.5 - Find the Taylor series expansion of cosx at x=0.Ch. 11.5 - Prob. 3CYU Ch. 11.5 - Prob. 4CYU Ch. 11.5 - Prob. 1E Ch. 11.5 - Prob. 2E Ch. 11.5 - Prob. 3E Ch. 11.5 - In Exercises 14, find the Taylor series at x=0 of...Ch. 11.5 - Prob. 5E Ch. 11.5 - Prob. 6E Ch. 11.5 - Prob. 7E Ch. 11.5 - Prob. 8E Ch. 11.5 - Prob. 9E Ch. 11.5 - In Exercises 520, find the Taylor series at x=0 of...Ch. 11.5 - Prob. 11E Ch. 11.5 - Prob. 12E Ch. 11.5 - Prob. 13E Ch. 11.5 - Prob. 14E Ch. 11.5 - In Exercises 520, find the Taylor series at x=0 of...Ch. 11.5 - Prob. 16E Ch. 11.5 - Prob. 17E Ch. 11.5 - Prob. 18E Ch. 11.5 - Prob. 19E Ch. 11.5 - In Exercises 520, find the Taylor series at x=0 of...Ch. 11.5 - Find the Taylor series of xex2 at x=0.Ch. 11.5 - Prob. 22E Ch. 11.5 - Prob. 23E Ch. 11.5 - Prob. 24E Ch. 11.5 - Prob. 25E Ch. 11.5 - Prob. 26E Ch. 11.5 - Prob. 27E Ch. 11.5 - Prob. 28E Ch. 11.5 - Prob. 29E Ch. 11.5 - Prob. 30E Ch. 11.5 - Prob. 31E Ch. 11.5 - Prob. 32E Ch. 11.5 - Prob. 33E Ch. 11.5 - The Taylor series at x=0 for 1+x21x is...Ch. 11.5 - Prob. 35E Ch. 11.5 - Prob. 36E Ch. 11.5 - Prob. 37E Ch. 11.5 - Prob. 38E Ch. 11.5 - In Exercises 3840, find the infinite series that...Ch. 11.5 - Prob. 40E Ch. 11.5 - Prob. 41E Ch. 11.5 - Prob. 42E Ch. 11.5 - Prob. 43E Ch. 11.5 - Prob. 44E Ch. 11.5 - Prob. 45E Ch. 11.5 - Prob. 46E Ch. 11 - Prob. 1CYU Ch. 11 - Prob. 2CYU Ch. 11 - Prob. 3CYU Ch. 11 - Prob. 4CYU Ch. 11 - Prob. 5CYU Ch. 11 - Prob. 6CYU Ch. 11 - What is meant by the sum of a convergent infinite...Ch. 11 - Prob. 8CYU Ch. 11 - Prob. 9CYU Ch. 11 - Prob. 10CYU Ch. 11 - Prob. 11CYU Ch. 11 - Prob. 1RE Ch. 11 - Prob. 2RE Ch. 11 - Prob. 3RE Ch. 11 - Prob. 4RE Ch. 11 - Prob. 5RE Ch. 11 - Prob. 6RE Ch. 11 - Prob. 7RE Ch. 11 - Prob. 8RE Ch. 11 - Prob. 9RE Ch. 11 - Use the third Taylor polynomial of ln(1x) at x=0...Ch. 11 - Prob. 11RE Ch. 11 - Prob. 12RE Ch. 11 - In Exercise 1320, find the sum of the given...Ch. 11 - Prob. 14RE Ch. 11 - Prob. 15RE Ch. 11 - Prob. 16RE Ch. 11 - Prob. 17RE Ch. 11 - Prob. 18RE Ch. 11 - Prob. 19RE Ch. 11 - Prob. 20RE Ch. 11 - Prob. 21RE Ch. 11 - Prob. 22RE Ch. 11 - Prob. 23RE Ch. 11 - Prob. 24RE Ch. 11 - Prob. 25RE Ch. 11 - Prob. 26RE Ch. 11 - Prob. 27RE Ch. 11 - Prob. 28RE Ch. 11 - Prob. 29RE Ch. 11 - In Exercise 2932, find the Taylor series at x=0 of...Ch. 11 - Prob. 31RE Ch. 11 - Prob. 32RE Ch. 11 - Fine the Taylor series of cos2x at x=0, either by...Ch. 11 - Prob. 34RE Ch. 11 - Prob. 35RE Ch. 11 - Prob. 36RE Ch. 11 - Prob. 37RE Ch. 11 - Prob. 38RE Ch. 11 - Prob. 39RE Ch. 11 - Prob. 40RE Ch. 11 - Prob. 41RE Ch. 11 - Prob. 42RE Ch. 11 - Prob. 43RE Ch. 11 - Prob. 44RE Ch. 11 - Prob. 45RE

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To prove: The series ∑ k = 1 ∞ k e k is convergent by using the integral test and the factthat lim b → ∞ b e − b = 0 .

Solution Summary: The author explains the integral test and the fact that undersetbtoinfty

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To prove: The series ∑k=1∞kek is convergent by using the integral test and the factthat limb→∞ be−b= 0.

Want to see the full answer?

Chapter 11 Solutions