Find the coefficient of `x^-7` in the expansion of `(2x-1/(3x^2))^11`.

Find the coefficient of x^7 in the expansion of (x-1/(x^2))^(40) .

Find the coefficient of x^-3 in the expansion of (x -1/(2x))^5

Find the coefficient of x^3 in the expansion of (2-3x)^7 ?

Find the coefficient of x^7 in the expansion of (3x^2+ 1/(5x))^11

Find the coefficient of x^7 in the expansion of (3x^2+ 1/(5x))^11

Find the coefficient of :x^(7) in the expansion of (x-(1)/(x^(2)))^(40)

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 .

Find the coefficient of x^(7) in the expansion of (x^(2)+(1)/(x^(2)))^(11)

Find the coefficients of x^(-2) in the expansion of (3x-(7)/(x))^(8)

Find the coefficient of x^11 in the expansion of (x-2/x^2)^17