Find the coefficients of `x^7` in `(a x^2+1/(b x))^(11)a n dx^(-7)in(a x^-1/(b x^2))^(11)` and find the relation between `aa n db` so that coefficients are equal.

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

If the coefficient of x^(7) in (ax+(1)/(x)) and x^(-7)" in" (bx-(1)/(x))^(9) are equal, find the relation between a and b?

Find the coefficient of x^(5) in (1+2x)^(6)(1-x)^(7)

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 (3x^2+ 1/(5x))^11

What is the coefficient of x^(n) in (x^(2) + 2x)^(n-1) ?

If the coefficient of x^7 in (x^2+1/(bx))^11 is equal to coefficient at x^-7 in (x+1/(bx^2))^11 Then find value of b