BdMO Online Forum •PROPERTY OF 3 [Self-Made]

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PROPERTY OF 3 [Self-Made]

Posted: Sat Dec 17, 2011 7:06 pm

by Phlembac Adib Hasan

For $n\ge 1$ prove that ${\sum^{2n}_{k=1}} ^{2n+1}C_k\equiv 0(mod3)$
Just Exercise.

Re: PROPERTY OF 3 [Self-Made]

Posted: Sat Dec 17, 2011 10:00 pm

by *Mahi*

Hint:
Binomial theorem.