Ok, so here goes nothing(adsbygoogle = window.adsbygoogle || []).push({});

I have predict what this is in series form, the factorial in the numerator is really throwing me off. I only have to do the series for the first six terms.

C0=C0

C2= -5/2 C0

C4= -3/4 C2 = (5x3)/(2x4) C0

C6= -1/6 C4 = -(5x3x1)/(2x4x6) C0

This is what I have so far, although I cannot completely find out the numerator:

n is 0,1,2,3

C(2n)=[(-1)^n][???]/[(2n)!!] C0

or

C(2n)=[(-1)^n][???]/[2^n x n!] C0

I cannot find out how to correctly represent the numerator. Can you guys give me any pointers?

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# Factorials in a series

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