1.

If(1 + x)^(n) = C_(0) + C_(1) x + C_(2) x^(2) + …+ C_(n) x^(n) , find the value of sumsum_(0 le i lt j le n) (i + j )(C_(i) + C_(i) C_(j)) .

Answer»


ANSWER :`N^(2) . 2^(n) + {2^(2N-1) - (2n!)/(2(n!)^(2))}`


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