The coefficients of three successive terms in the expansion of `(1+x)^n` are in the ratio 6:33:110. Find n.

The coefficients of three consecutive terms in the expansion of (1+a)^n are in the ratio : 6: 33: 110. Find n.

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

The middle term in the expansion of (1 + x)^(2n) is :

If three successive coefficients in the expansion of (1+x)^n are 28, 56 and 70, find n.

If the coefficients of three consecutive terms in the expansion of (1 + x)^(n) are 165,330 and 462 respectively , the value of n is is

If the coefficients of 5th, 6th , and 7th terms in the expansion of (1+x)^n are in A.P., then n=

The coefficients of three consecutive terms of (1+x)^(n+5) are in the ratio 5:10:14. Then n= ___________.

If the coefficients of second, third and fourth terms in the expansion of (1+x)^n are in AP then n equals

Find the middle terms in the expansion of : (x/y+y/x)^(2n+1) .