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- Nov 25th 2008, 03:48 PM #1

- Nov 26th 2008, 06:12 AM #2

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- Oct 2008
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- Nov 26th 2008, 07:30 AM #3

You can either apply the Root or Ratio test to find that the interval of covnergence is , or you can use the fact that

Once again the Root, Ratio, or integral tests would work. Or you could note that is divergent and the only thing that will make it converge in this case is a "dominant" geometric series provided by , so