Hi, am a bit stuck with this.(adsbygoogle = window.adsbygoogle || []).push({});

Find the radius of convergence of the complex series

(Sigma n=1 to infinity) (z - e)^n!

I know that the answer is R=1 but I'm not sure how to get there.

It's the factorial as a power which I'm not sure about, have seen this in some other problems too.

I have tried using the Ratio Test to determine radius of convergence but doesn't seem to be working.

Any ideas anyone?

Thanks in advance, and apologies for the lack of Latex.

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# Find Radius of Convergence of this Complex Series

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