The sum of the coefficients in the expansion of `(2+5x^2-7x^3)^2000=` (A) 0 (B) 1 (C) 2 (D) none of these

The sum of the coefficient in the expansion of (1 + x+x^2)^n is

The sum of the coefficients in the expansion of (1+x-3x^2)^(171) is

The sum of the coefficient in the expansion of (1+ax-2x^(2))^(n) is

The sum of the coefficients in the expansion of (1 - x + x^(2) - x^(3))^(n) ,is

Find the sum of the coefficients in the expansion of (1+2x+3x^2+ n x^n)^2dot

The coefficient x^5 in the expansion of (2 - x + 3x^2)^6 is

The number of terms in te expansion of (1+5x+10x^2+10x^3+x^5)^20 is (A) 100 (B) 101 (C) 120 (D) none of these

The coefficient of x^4 in the expansion of (1+x-2x^2)^7 is

The coefficient of x^4 in the expansion of (1+x-2x^2)^7 is :

The number of terms in the expansion of (x+1/x+1)^n is (A) 2n (B) 2n+1 (C) 2n-1 (D) none of these