Prove that 1/2 nC1 -1/3 nC2 + 1/4 nC3 -1/5 nC4 + - - - + (-1)^(n-1)/(n + 1) nCn = n/(n + 1)

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A-94
Prove that
1/2nC1 -1/3nC2 + 1/4nC3 -1/5nC4 + - - - + (-1)^(n-1)/(n + 1) nCn = n/(n + 1)
#algebra #identities #binomial_theorem #cipher
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This is a hell of a proof. I can see the meticulous work you have put into it. Waiting for the differentiation/integration alternative method.

slavinojunepri
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I think we can apply integration on binomial theorem just like last time you use differentiation

JacobHa