The co-efficient of x `x^(n-2)` in `(x-1)(x-2)(x-3)(x-n)` is :

Co-efficient of x^(n) in the expansion

The co-efficient of x^(n) in (1+x+2x^(2)+3x^(3)+...+nx^(n))^(2) is

The coefficient of x^(n) in (1-(x)/(1!)+(x^(2))/(2!)-(x^(3))/(3!)+...+((-1)^(n)x^(n))/(n!))^(2) is equal to

if n is a positive integer,find the co-efficient of x^(n) in the expansion of ((3x-2)^(n))/((1-x)^(2))

Let the co-efficients of x^(n) In (1+x)^(2n) and (1+x)^(2n-1) be P& Qrespectively,then ((P+Q)/(Q))^(5)=

'Prove that the co-efficient of x^n of the expansion of (1+x)^(2n) is the double of the coefficient of x^n of the expansion of '(1+x)^(2n-1)'

Let the co-efficients of x^n In (1+x)^(2n) and (1+x)^(2n-1) be P & Qrespectively, then ((P+Q)/Q)^5=

If |x| lt 1 , then the co - efficient of x^(n) in the expansion of (1+x+x^(2)+…. )^(2) is :

If |x|<1, then the co-efficient of x^(n) in the expansion of (1+x+x^(2)+x^(3)+....)^(2) is

If A and B are co efficients of x^(n) in the expasion of (1+x)^(2n)and(1+x)^(2n-1) respectively then (A)/(B) …………..