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

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 .

Find the 7^(th) term in the expansion of (3x - (2y)/3)^(10)

Find the 7^(th) term in the expansion of (x+3y)^(8)

Find the middle term (terms ) in the expansion of (x/a =a/x)^(10)

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

The number of terms in the expansion of (x+y+z)^(n)……….

Find the middle term (terms ) in the expansion of (3x - (x^(3))/6)^(9)

Find the middle terms in the expansions of (x/3 + 9Y)^10 .

Find the general term in the expansion of (5x-3)^(12)

Find the general term in the expansion of (x+3y)^(10)