http://www.mathhelpforum.com/math-he...1&d=1210999716

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- May 16th 2008, 09:48 PMszpengchaowallis product problem
- May 16th 2008, 09:55 PMMathstud28
- May 16th 2008, 10:07 PMmr fantastic
The first part is a routine reduction formula question found all over MHF and indeed all over the net (you don't seem to have done much research). A MHF thread:

http://www.mathhelpforum.com/math-he...n-formula.html

For the other parts, I suggest you first play around with concrete values of n to get the feeling for the formula.