The 21st and 22nd terms in the expansion of `(1+x)^44` are equal. Then x:

If the 21st and 22nd terms in the expansin of (1+x)^44 are equal then x is equal to (A) 21/20 (B) 23/24 (C) 8/7 (D) 7/8

Find the 2nd term in the expansion of (1+x)^12

if the coefficient of (2r+1) th term and (r+2) th term in the expansion of (1+x)^(43) are equal then r=?

If the coefficients of rth and (r+1)t h terms in the expansion of (3+7x)^(29) are equal, then r is equals to a. 15 b. 21 c. 14 d. none of these

If the coefficients of rth and (r+1)t h terms in the expansion of (3+7x)^(29) are equal, then r equals a. 15 b. 21 c. 14 d. none of these

If the coefficients of 2nd, 3rd and 4th terms in the expansion of (1+x)^(2n) are in A.P. Then find the value of n .

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

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

If two consecutive terms in the expansion of (x+a)^n are equal to where n is a positive integer then ((n+1)a)/(x+a) is

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