Hello there,

My friends and I were talking and we have been wondering the following:

If the absolute value of a series converges, does the series converge?

This came up when we were talking about alternating series'.

Thanks,

Rob

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- Apr 11th 2013, 02:35 PMRobertXIVRandom Series Question
Hello there,

My friends and I were talking and we have been wondering the following:

If the absolute value of a series converges, does the series converge?

This came up when we were talking about alternating series'.

Thanks,

Rob - Apr 11th 2013, 02:55 PMPlatoRe: Random Series Question
- Apr 11th 2013, 04:14 PMRobertXIVRe: Random Series Question
Sorry, sorry, I meant the first one. Thanks a lot!

- Apr 11th 2013, 04:43 PMPlatoRe: Random Series Question

The first one is the series of absolute values whereas what you posted is the absolute value of a series. You can see the difference.

Here why it works.**Series convergence is**__all about__the convergence of a sequence of partial sums.

See that .

Thus if the sequence converges so does