Question

Hello!

I'm taking a Calculus course and I came up with this problem, which I'm not sure whether below method is the best one to solve this.
Your thoughts on this is highly appreciated.
Many thanks!

Question:
Using a suitable test determine whether the infinite series,

Sigma n=1 - infinity [ (e^(n+1))/((ln(n))^n) ] converges or diverges

The method I followed:

I considered the the nth term of the series a_n = [ (e^(n+1))/((ln(n))^n) ]

Then I considered the Root test to determine the convergence of divergence of this series, which derived;

lim n-->infinity |a_n|^(1/n) = lim n-->infinity [(e^(1/n))/(ln(n))]

Hence,

lim n-->infinity
|a_n|^(1/n) = 1/infinity -->0 < 1

Hence, by Root test, the above series converges.

Is this a correct method or is(are) their any other more suitable method(s) for determining the convergence/divergence of this series?

Answer 1

take a look here at stackexchange . com

questions/670345/comparison-test-of-sum1-lnnn