I'm having trouble determining whether these series converge or diverge.(adsbygoogle = window.adsbygoogle || []).push({});

1. sigma sqrt(n/(n^4-2))

I tried ratio test, but it gave me 1 as the answer (indeterminate)

2. sigma sin (pi/x)

3. sigma sin(x)

I know that sin(x) is bounded......

Any hints?

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# Homework Help: Series convergence

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