Sorry to bother with another similar question to the one I was asking earlier, but I have one more series that I'm stuck on...
I'm pretty sure I did the cancellation right on this one:
How do you tackle this kind of series when that test fails? I lean towards the comparison test, but I'm having trouble thinking of a comparable series that would appropriately converge or diverge to provide me with meaningful information.
Alternatively You can use the [not very 'popular'...] 'Raabe test' according to which, given a positive terms series...
... if for n 'large enough' ...
(1)
... the series converges and if...
(2)
... the series diverges. In your case is...
(3)
... so that the series diverges...
Kind regards