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

The 21 st and 22 nd 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

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

The number of terms in the expansion of (1+x)^(21)=

If the binomial coefficient of (2r+4)^(th) term and (r-2)^(th) term in the expansion of (1+x)^(21) are equal, then the value of r equals

If the coefficients of (2r+4)^(th) term and (r-2)^(th) term in the expansion of (1+x)^(18) are equal then r=

Constant term in the expansion of (x-(1)/(x))^(10) 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)

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) .