The coefficient of `x^(28)` in the expansion of `(1+x^3-x^6)^(30)` is `1` b. `0` c. `30 C_6` d. `^30 C_3`

The coefficient of x^(7) in the expansion of (1-x-x^(2) + x^(3))^(6) is :

Find the coefficient of x^(6) in the expansion of (3+2x)^(10) .

The coefficient of x^(10) in the expansion of (1+x^2-x^3)^8 is 476 b. 496 c. 506 d. 528

The coefficient of x^5 in the expansion of (x^2-x-2)^5 is -83 b. -82 c. -86 d. -81

Coefficient of x^(11) in the expansion of (1+x^2)^4(1+x^3)^7(1+x^4)^(12) is 1051 b. 1106 c. 1113 d. 1120

The coefficient of x^2y^3 in the expansion of (1-x+y)^(20) is (20 !)/(213 !) b. -(20 !)/(213 !) c. (20 !)/(15!2!3!) d. none of these

The coefficient x^5 in the expansion of (1+x)^(21)+(1+x)^(22)++(1+x)^(30) is a. "^51 C_5 b. "^9C_5 c. "^31 C_6 -"^(21)C_6 d. "^30 C_5 + "^(20)C_5

Find the coefficient of a^3b^4c^5 in the expansion of (b c+c a+a b)^6dot

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

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