If (1+x)^(n)=C(0)+C(1)+x+C(2)x^(2)+...+C...

If `(1+x)^(n)=C_(0)+C_(1)+x+C_(2)x^(2)+...+C_(n)x^(n)` show that,
`C_(0)-2^(2)C_(1)+3^(2)C_(2)-...+(-1)^(n)(n+1)^(2)C_(n)=0 (n gt 2)`

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