IF `C_0 + C_1 + C_2 +...+C_n = 256`, then `"^(2n)C_2` is equal to

If C_(0)+C_(1)+C_(2)+.............+Cn=256 then .^(2n)C_(2) is equal to - (1) (a) 56 (b) 120 (c) 28 (d) 91

If (1+x)^n = C_0 + C_1 x+ C_2 x^2 + ….....+ C_n x^n, then C_0+2. C_1 +3. C_2 +….+(n+1) . C_n=

If n=5 ,then ("^n C_0)^(2) + ("^n C_1)^(2) + ("^n C_2)^(2) +......+ ("^n C_5)^(2) is equal to

If C_0,C_1,C_2,....,C_n are coefficients in the binomial expansion of (1+x)^n and n is even, then C_0^2-C_1^2+C_2^2-C_3^2 + ... +(-1) C_n^2, is equal to

If C_0, C_1, C_2,………C_n are binomial coefficients int eh expansion of (1+x)^n then and n is even, then C_0^2-C_1^2+C_2^2-C_3^2 + ... +(-1) C_n^2 , is equal to

C_(0)-C_(1)+C_(2)-C_(3)+ ---+(-1)^(n)""^(n)C_(n) is equal to

If (1 + x)^n = C_0+C_1x+C_2x^2 + ... + C_nx^n ,then for n odd, C_0^2-C_1^2+C_2^2-C_3^2 + ... +(-1) C_n^2 , is equal to