The coefficient of `x^5in(1+2x+3x^2+)^(-3//2)i s(|x|<1)` `21` b. `25` c. `26` d. none of these

Let l,m,n are the coefficients of x^5 in (1+2x+3x^2+…..)^(-3//2), (1+x+x^2 +x^3+….)^2, (1+x)^5 Respectively then :

The coefficient of x^5 in (2-x +3x^2)^6 is

The coefficient of x^(5)in(1+2x+3x^(2)+...)^(-3/2)is(|x|<1)21 b.25c.26d .none of these

Coefficient of x^5 in (1+x +x^2 +x^3)^10 is

Coefficient of x^5 in (1+x +x^2 +x^3)^10 is

Find the coefficient of x^6 in (1 - 3x)^(-2//5)

The coefficient of x^(5) in (1+2x+3x^(2)+ . . .)^(-3//2) is: