Whar is the Taylor series representation for f(x)=ln(1+4x) and the interval of convergence?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
Problem 25RE
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Whar is the Taylor series representation for f(x)=ln(1+4x) and the interval of convergence?

Expert Solution
Step 1

Calculus homework question answer, step 1, image 1

we know that

Calculus homework question answer, step 1, image 2

Replacing x by -4x , we get

Calculus homework question answer, step 1, image 3

Step 2

We will use the Ratio test to find radius of convergence.

Calculus homework question answer, step 2, image 1

By ratio test , the series converges for

Calculus homework question answer, step 2, image 2

When Calculus homework question answer, step 2, image 3, series become

Calculus homework question answer, step 2, image 4

which is divergent

When x=1/4, series become

Calculus homework question answer, step 2, image 5

which is also not convergent.

Therefore, interval of convergence is (-1/4,1/4)

 

 

 

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