Findthe coefficient of `x^4` in te expansion of `(1+x+2x^2)^6`

Find the coefficients of x^4 in the expansion of (1+x+x^2)^3

Find the coefficient of x^4 in the expansion of (1-x^2)^n

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

Find the coefficient of x^4 in the expansion of (1+x+x^2+x^3)^6

Find the coefficient of x^5 in the expansion of : (1 + 2x)^6 (1- x)^7 using binomial theorem.

Find the coefficient of x^5 in the expansion of (1 + 2x)^6 (1-x)^7 .

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

Find the coefficient of x^4 in the expansion of (1+x+x^2 +x^3 )^11 x^4 in the expansion of (2-x+ 3 x^2)^6

Find the coefficient of x^6 in the expansion of (1/x^2 + x^4)^18