- #1
invasmani
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Homework Statement
I have two relatively similar problems:
1.) Sigma n=1 to infinity ((ln n)^3 / n^2)
2.) Sigma n=1 to infinity (1 / sqrt(n) * (ln n)^4)
I'm to prove their convergence or divergence using either the direct comparison test or the limit comparison test.
I understand both comparison tests, however, I am very much stumped on how to determine a working bn for the problems.
The Attempt at a Solution
I've tried using a known p-series, such as 1/(n^2) for problem #1, which is convergent. However, that p-series is not greater than the an in this case.
I'd appreciate any sort of direction on this.