If the three consecutive coefficients in the expansion of `(1+x)^n` are 28, 56, and 70, then the value of `n` is.

The greatest coefficient in the expansion of (1+x)^(2n) is

What is the sum of the coefficients in the expansion of (1+x)^(n) ?

If three successive coefficients in the expansion of (1+x)^(n) be 220,495 and 972 find n.

I three consecutive coefficients in the expansion of (1+x)^n are in the ratio 6:33:110, find n and r.

If three consecutive coefficients in the expansion of (1+x)^(n) be 56,70 and 56, find n and the position of the coefficients.