If the coefficients of `x^(7) and x^(8)` in the expansion of `(2+x/3)^(n)` are equal then find the value of n.

If the coefficients of x^(7) and x^(8) in the expansion of (2+x/3)^(n) are equal then n is

If the coefficients of x^(7) and x^(8) in the expansion of [2+(x)/(3)]^(n) are equal,then the value of n is :(A)15(B)45(C)55(D)56

If the coefficients of x^7 and x^8 in the expansion of [2 +x/3]^n are equal, then the value of n is : (A) 15 (B) 45 (C) 55 (D) 56

in If the coefficient of x^(r) and x^(r+1) are equal in the expansion of (1+x)^(2n+1), then find the value of r.

If the coefficient of x^(r)andx^(r+1) are equal in the expansion of (1+x)^(2n+1) , then find the value of r .

if the coefficients of x^7 & x^8 in the expansion (2+x/3)^n are equal then n is equal to

The coefficient of x^(n) in the expansion of (2+3x)(e^(-3x)) is