n=1 n=1 2 (−1)n 3n Σ n=1 ที 5 4n 2n2 + 7 3n2 – 1

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
Problem 44RE
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Hey,

I have three sequenzes i have to decide wether they are convergence or divergence.(picture)

for the first one i have a feeling of using the Alternating series test but i dont really get how to prove it that way.

For the second o abd third  i tried L´hospital and the ratio test but it didnt really go anywhere.

Can anyone help?

 

 

L
n=1
n=1
2 (-1) n
3n
M
n=1
n5
4n
2n2 + 7
3n2 – 1
Transcribed Image Text:L n=1 n=1 2 (-1) n 3n M n=1 n5 4n 2n2 + 7 3n2 – 1
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