I have this problem as follow(adsbygoogle = window.adsbygoogle || []).push({});

prove that

Summation of k=1 to n to the following term

( (-1)^(k+1) (( 2n-k) C ( k-1)) (4^(n-k))/k ) = ((4^n) - 1)/(2 n +1)

Note that the symbol C above meant the symbol of combination .

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# Homework Help: Combinatrics Problem

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