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**Karrl****Guest**

How do I find i !,I know it is done by integral found in gamma function,but i cannot integrate it,please help.(additionally,I am a little bad in calculus)

**zetafunc.****Guest**

Finding that integral is pretty difficult. You need to find an approximation with Taylor series, and the answer is not particularly nice...

**Karrl****Guest**

Isn't there any way to intigrate?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,309

Hi;

The gamma function is defined as

If it could be integrated then that would be the definition of the gamma function, not the integral.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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