The coefficient of `a^3b^6c` in the expansionof `(2a-b+c)^10` is (A) 6720 (B) 840 (C) 10 (D) none of these

The coefficient of x^3 in the expansion of (1-x+x^2)^5 is (a). -83 (b). 0 (c) .^(30)C_(10) (d). none of these

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

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

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

Find the coefficient of x^2 y^3 z^4 in the expansion of (ax -by +cz)^9 (b) a^2 b^3 c^4 d in the expansion of (a -b-c +d)^10

Coefficient of a^8b^6c^4 in (a+b+c)^18 is

The coefficient of x^8y^(10) in the expansion of (x+y)^(18) is a. \ ^(18)C_8 b. \ ^(18)P_(10) c. 2^(18) d. none of these

If the sum of the coefficients in the expansion of (1-3x+10 x^2)^ni sa and if the sum of the coefficients in the expansion of (1+x^2)^n is b , then a. a=3b b. a=b^3 c. b=a^3 d. none of these

The coefficient of x^4 in (x//2-3//x^2)^10 is a. (405)/(256) b. (504)/(259) c. (450)/(263) d. none of these

The coefficient of x^4 in (x//2-3//x^2)^10 is (405)/(256) b. (504)/(259) c. (450)/(263) d. none of these