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I'm trying to find the values of p for which the series converges (in interval notation). I used the integral test and came up with:

if p<=-1 the series should be convergent, right?

However, I entered (-inf, 0) as my answer and it came up incorrect.

You said it: should be the answer...

Tonio

Could someone please help/correct me?

It would be much appreciated! Thank you!