- #1
ToNoAvail27
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Homework Statement
Does [itex]\sum_{n=1}^{\infty}a_n[/itex] where [itex]a_n = \frac{(n+1)^{1/3}-n^{1/3}}{n}[/itex] converge or diverge?
Homework Equations
The Attempt at a Solution
The ratio test is inconclusive, as is the root test. The limit is equal to 0, but that doesn't say much. I've tried to find another series to compare it too, but with the cube roots, I'm having a bit of trouble. I have, but they've all been bigger and have diverged, which again doesn't help. Usually, I can guess one by seeing if one term takes over the other over time, but this one is stumping me. Could I perhaps get a hint as to what to consider in order to find a suitable series? I just need a small push in the right direction. Thanks for your time