OK, last problem. What is ? Could I combine the sums? I am unsure of how to, though.

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- Jan 30th 2010, 11:40 AMPaulDirac2Double Sum
OK, last problem. What is ? Could I combine the sums? I am unsure of how to, though.

- Jan 30th 2010, 01:44 PMTKHunny
Combine?! Why would you want to do that?

You can pull out the "n!" and the .

That might give you somewhere to go.

1) Does the inner-sum converge?

2) Does the alternating sign out front make it any better? - Jan 30th 2010, 03:14 PMPaulDirac2Double Sum
I am getting that the sum goes to infinity- is this right?

- Jan 30th 2010, 03:37 PMTKHunny
If you mean, "Increases Without Bound", that could be closer.