July 18th, 2015, 05:43 AM  #1 
Member Joined: Apr 2015 From: Indonesia Posts: 53 Thanks: 2  Factorial relating Pi
Been working on this problem lately. I realized that ((k!)^2)/(2k)! is equal to 1/[(2n)_C_(n)]. I found its answer contains pi. How to solve this? Should I use the gamma function?


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