Find n if the coefficients of 4th the 13th terms in the expansion of `(a+b)^n` are equal.

If the coefficients of 4^(th) and 13^(th) terms in the expansion of (a+b)^(n) are equal then find n .

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

What is the coefficient of the (r+1)^(th) term in the expansion of (1+x)^n ?

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

If the coefficients of (2r + 4)th, (r - 2)th terms in the expansion of (1 + x)^18 are equal, find r.

If the coefficients of (p+1) th and (P+3) th terms in the expansion of (1+x)^(2n) are equal then prove that n=p+1

If the coefficients of (p+1) th and (P+3) th terms in the expansion of (1+x)^(2n) are equal then prove that n=p+1