The coefficient of `x^2y^4z^2` in the expansion of `(2x - 3y + 4z)^9` is

The coefficient of x^(2)y^(4)z^(2) in the expansion of (2x-3y+4z)^(9) is

The coefficient of x^(2)y^(5)z^(3) in the expansion of (2x+y+3z)^(10) is

The coefficient of x^3y^4z in the expansion of (1+x+y-z)^9 is (A) 2.^9C_7.^7C_4 (B) -2.^9C_2 . ^7C_4 (C) ^9C_7.^7C_4 (D) none of these

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

Find the coffiecient of x^2 y^3 z^4 w in the expansion of (x-y-z+w)^(10)

The coefficients of x^(2)y^(2),yzt^(2) and xyzt in the expansion of (x+y+z+t)^(4) are in the ratio

The total number of terms in the expansion of (2x - y + 4z)^(12) ,is

The number of terms in the expansion of (2x+3y-4z)^(n) is

The number of terms in the expansion of (2x+3y-4z)^(n) is

The sum of the coefficients in the expansion of (x+2y+3z)^(8) is