Find the `r^th` term from the end in the expansion of `(x + a)^n`.

Find the (n+1)th term from the end in the expansion of (2x - (1)/(x))^(3n)

Write the 4th term from the end in the expansion of ((x^3)/( 2) - (2)/(x^2) )^7 .

Find n, if the ratio of the fifth term from beginning to the fifth term from the end in the expansion of (root(4)(2) + 1/root(4)(3))^n id sqrt6:1 .

The 5th term from the end in the expansion of ((x^(3))/(2)-(2)/(x))^(12) is

Find the 4^(th) term in the expansion of (x-2y)^12 .

The 6^(th) term for the end of the expansion of (3 x-(1)/(x^(2)))^(10) is

If the rth term is the middle term in the expansion of (x^(2)-(1)/(2x))^(20) , then the (r+3)th term is:

Find the middle term in the expansion of : (a/x+\ b x)^(12)

The middle term in the expansion of (1+x)^(2n) is:

Find the terms independent of x in the expansion of (x^(2)+1/x)^(9)