Coefficient of `a^2b^3` in expansion of `(1+a+b)^10` is-

Coefficient of a^(2)b^(3) in expansion of (1+a+b)^(10) is-

Find the coefficient of a^5b^7 in the expansion of (a-2b)^12

The coefficient of a^4b^5 in the expansion of (a+b)^9 is ______.

The coefficient of a^3b^4c in the expansion of (1+a-b+c)^9 is equal to

Coefficient of a^(2)b^(2) in the expansion of (a+b)^(3)(a-2b)^(4) is

Coefficient of a^(2)b^(5) in the expansion of (a+b)^(3)(a-2b)^(4) is (A) 24 (B) 96(C)-24 (D) None of these

Find the coefficient of a^-6 b^4 in the expansion of (1/a-(2b)/3)^10 .

The coefficient of a^(3)b^(2)c in the expansion of (1+a-b+c)^(9) is

coefficient of a^(3)b^(2)c in the expansion of (1+a-b+c)^(9)

Find the coefficient of a^(2)b^(3)c^(4)d in the expansion of (a-b-c+d)^(10) .