http://img21.imageshack.us/img21/1258/nmnmnm.png

How do you do this?

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- Mar 13th 2009, 08:06 PMVkLIntegral Question
http://img21.imageshack.us/img21/1258/nmnmnm.png

How do you do this? - Mar 13th 2009, 08:08 PMo_O
- Mar 13th 2009, 10:40 PMmatheagle
That's the definition of the Gamma function...

.

for a>0. The first thing you learn about this function is that

and it's easy to show that

. Thus ...., whence where n is an integer.