Maximum sum of coefficient in the expansion of `(1-xsintheta+x^2)^n` is `1` b. `2^n` c. `3^n` d. `0`

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

What is the sum of the coefficients in the expansion of (1+x)^(n) ?

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)+...nx^(n))^(2)

Let S(theta) denote the sum of coefficients in the expansion of (sqrt2-xsintheta+x^(2)costheta)^(2n) . Maximum value of S(theta) is

The sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)

Suppose the sum of the coefficients in the expansion of (1 - 5x + 12x^(3))^(n) is a and the sum of the coefficients in the expansion of (1 - 2x + 3x^(2))^n is b. If a = b^(m) , then m = ___