" Sum of coefficients of odd powers of "x" in expansion of "(9x^(2)+x-8)

Sum of coefficients of odd powers of x in expression of (9x^(2)+x-8)^(6)

The sum of coefficients of odd powers of x in the expansion of (1+x-x^2-x^3)^6 is

The sum of the coefficient of odd powers of x in the expansion of (1+x+x^2)^15 is

The sum of the coefficients of odd powers of x in the expansion (1+x+x^(2)+x^(3))^(5)

Sum of coefficient of even powers of x in the expansion of (1+x+x^(2)+x^(3))^(5) is:

The sum of the coefficients of even powers of x in the expansion of (1+x+x^2)^15 is

The sum of the coefficients of even power of x in the expansion of (1+x+x^(2)+x^(3))^(5) is 256 b.128c.512d.64