In the expansion of `(1+x)^(50),` find the sum of coefficients of odd powers of `xdot`

In the expansion of (1+x)^(70) , the sum of coefficients of odd powers of x is

In the expansion of (1+x)^(30) the sum of the coefficients of odd powers of x is

In the expansion of (1+x)^(n) ,Then sum of the coefficients of odd power of x is

In the expansion of (1+x)^50 the sum of the coefficients of odd poer 5 to x is (A) 0 (B) 2^50 (C) 2^49 (D) 2^51

The ratio of the coefficient of the middle term in the expansion of (1+x)^(20) and the sum of the coefficients of two middle terms in expansion of (1+x)^(19) is _____ .

Show that the coefficient of middle term in the expansion of (1 + x)^(20) is equal to the sum of the coefficients of two middle terms in the expansion of (1 + x)^(19) .