If `1 + 2^2x + 3^2x^2 + 4^2x^3 ....., ` then the nth term of the

If y=2x+3x^2 + 4x^3 +…, then x I terms of y is

if a=2x+3,d=3x+5, then nth term is

Evaluate : 1^(2) + 2 ^(2) x + 3 ^(2) x ^(2) + 4 ^(2) x ^(3) …….. upto infinite terms for |x| lt 1.

If x_1 x_2 x_3 = 4(4 + x_1 + x_2 + x_3 ) , then what is the value of [1//(2 + x_1 )] + [1//(2 + x_2 )] + [1//(2 + x_3 )] ?

1 + ""^2C_1x + ""^3C_2 x^2+ ""^4C_3 x^3 + ….. to oo terms can be summed up if

The numbers (x-6), 2x, x^2 are in G.P. find nth term

If 2x-1/(3x)=y then 9x^2+1/(4x^2) in terms of y is