If the coefficients of `x^9, x^10, x^11` in the expansion of `(1+x)^n` are in arithmetic progression then `n^2=41n=`

if the coefficients of x,x^2 and x^3 in the binomial expansion (1+x)^(2n) are in arithmetic progression then prove that 2n^2-9n+7=0

If the coefficients of x^(9),x^(10),x^(11) in expansion of (1+x)^(n) are in A.P., the prove that n^(2)-41n+398=0 .

If the coefficients of x^(9),x^(10),x^(11) in expansion of (1+x)^(n) are in A.P., the prove that n^(2)-41n+398=0 .

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

The coefficient of x^(n) in the expansion of log_(a)(1+x) is

The coefficient of x^(n) in the expansion of log_(a)(1+x) is