The coefficient of `x^(7)` in the expansion of `((x^(2))/(2)-(2)/(x))^(9)` is

Find the coefficient of x^(7) in the expansion of (2x^(2)-(1)/(x))^(20)

Find the coefficient of x^(7) in the expansion of (2x^(2)-(1)/(x))^(20)

The coefficient of x^(6) a^(-2) in the expansion of ((x^(2))/(a)-(a)/(x))^(12) , is

The coefficient of x^(2) in the expansion of (1-x+2x^(2))(x+(1)/(x))^(10) is

The coefficient of x^(4) in the expansion of (1+x+x^(2))^(6) is

The coefficient of x^(6) in the expansion of (1+x+x^(2))^(6) is

The coefficient of x^(r) in the expansion of (1-ax-x^(2))/(e^(x)) is

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

Find the coefficient of x^(7) in the expansion of (ax^(2) + (1)/(bx))^(11) . (ii) the coefficient of x^(-7) in the expansion of (ax + (1)/(bx^2))^(11) . Also , find the relation between a and b , so that these coefficients are equal .

The coefficient of x^(n) in the expansion of ((1+x)^(2))/((1 - x)^(3)) , is