What is the sum of the coefficients of all the terms in the expansion of `(45x-49)^(4)` ?

The sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)

The sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)

The sum of the coefficients of the terms of the expansion of (3x-2y)^n is

What is the sum of the coefficients of first and last terms in the expansion of (1 + x)^(2n) , where n is a natural number?

Show that the sum of the coefficients of all odd terms in the expansion of (1+x)^(2p) is 2^(2p-1) .

The sum of the coefficients of the first 10 terms in the expansion of (1-x)^(-3) is

Prove that the coefficient of the middle term in the expansion of (1+x)^(2n) is equal to the sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)