If `C_(0), C_(1), C_(2), …, C_(n)` denote the binomial coefficients   in the expansion of `(1 + x)^(
Channel: Doubtnut
Date: 2020-05-24

If `C_(0), C_(1), C_(2), …, C_(n)` denote the binomial coefficients   in the expansion of `(1 + x)^(n)`, then   `C_(0)""^(2) + 2 C_(1)""^(2) + 3C_(2)""^(2) + ...+ (n +1)C_(n)""^(2) =`