) Find the coefficient of x in the expansion of `(2x-3/x)^9`.

Find the coefficient of x^5 in the expansion of (x+3)^9

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

Find the coefficients of x^4 in the expansion of (1+x+x^2)^3

the coefficient of x in the expansion of (3x+2)^(2) is

Find the coefficient of x-2 in the expansion of (x-(1)/(x))^(12)

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

Find the coefficient of x^(4) in the expansion of (2-x+3x^(2))^(6)

Find the coefficient of (i) x^(5)" in the expansion of "(x+3)^(8) (ii) x^(6) " in the expansion of "(3x^(2) - a/(3x))^(9) (iii) x^(-15) " in the expansion of " (3x^(2) - a/(3x^(3)))^(10). (iv) a^(7)b^(5)" in the expansion of "(a-2b)^(12) .