Find n if the coefficients of the 3rd term from the end in the expansion of `(2+x)^n` is 45.

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 :

The coefficient of the middle term in the expansion of (x+2y)^(6) is

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

Find the coefficient of the term involving x^10 in the expansion of (x^2-2)^11 .

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

Sum of coefficients of expansion of B is 6561 . The difference of the coefficient of third to the second term in the expansion of A is equal to 117 . The ratio of the coefficient of second term from the beginning and the end in the expansion of B , is

Find the coefficient of the term involving x^2 in the expansion of (3x-1/x)^6 .

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

B= (5/2+x/2)^n , A= (1 + 3x)^m Sum of coefficients of expansion of B is 6561 . The difference of the coefficient of third to the second term in the expansion of A is equal to 117 . If n^(m) is divided by 7 , the remainder is