If in the expansion of `(2^x+1/4^x)^n , T_3/T_2 = 7` and the sum of the co-efficients of `2nd` and `3rd` terms is `36,` then the value of `x` is

If in the expansion of (1+x)^(n) the coefficient of 2nd, 3rd and 4th terms are in A.P., then the value of n is-

In the expansion of (2x^2-3)^7(x+1)^3 ,the sum of numerical co-efficients is

In the expansion of (1 + x)^(n) (1 + y)^(n) (1 + z)^(n) , the sum of the co-efficients of the terms of degree 'r' is

In the expansion of (1 + x)^(n) (1 + y)^(n) (1 + z)^(n) , the sum of the co-efficients of the terms of degree 'r' is

If the coefficients of 2nd, 3rd, 4th terms of (1+x)^n are in A.P. then n=

In the expansion of (2-3x)^(-1), the 3 rd term is

If the number of terms in the expansion of (1-2/x+4/(x^2))^n , x!=0, is 28, then the sum of the coefficients of all the terms in this expansion, is : (1) 64 (2) 2187 (3) 243 (4) 729

If the number of terms in the expansion of (1-2/x+4/(x^2))^n , x!=0, is 28, then the sum of the coefficients of all the terms in this expansion, is : (1) 64 (2) 2187 (3) 243 (4) 729

If the number of terms in the expansion of (1-2/x+4/(x^2))^n , x!=0, is 28, then the sum of the coefficients of all the terms in this expansion, is : (1) 64 (2) 2187 (3) 243 (4) 729

The sum of the co-efficients of all the even powers of x in the expansion of (2x^(2)-3x+1)^(11) is -