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

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

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

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

Write the 4th term from the end in the expansion of ((x^3)/( 2) - (2)/(x^2) )^9 .

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

Find the 6th term in the expansion of (3x^2-1/3x)^8

Find 5th term in the expansion of (2x^2-1/3x)^11 .