The sum of the series `1+2(1 +1/n)+ 3(1+1/n)^2+.... oo` is given by
A. `n^2 + 1`
B. `n(n + 1)`
C. `n(1 + n)^2`
D. `n^2`

The sum to n terms of the series 1+2(1+1/n)+3(1+1/n)^2+....... is given by

Find the sum of the series 1.n+2(n-1)+3(n-2)+.....n.1 .

The sum to n terms of the series 1+2 (1+(1)/(n))+3 (1+(1)/(n))^(2)+ cdots is given by

The sum of n terms of the series 1+2 (1 + (1)/(n)) +3 (1+ (1)/(n))^(2) + ….is

The sum to infinity of the series 1+2(1-(1)/(n))+3(1-(1)/(n))^(2)+ . . .. . . . , is (A) n^(2) (B) n(n+1) (C) n(1+(1)/(n))^(2) (D)None of these

The sum to infinity of the series 1+2(1-(1)/(n))+3(1-(1)/(n))^(2)+ . . .. . . . , is (A) n^(2) (B) n(n+1) (C) n(1+(1)/(n))^(2) (D)None of these

Find the sum of the series 1.n + 2 .(n-1) + 3.(n-2) + cdots + ( n-1) .2 + n.1.

The sum of 1+n(1-1/x)+(n(n+1))/(2!)(1-1/x)^2+.....oo

Find the sum of the series: 1. n+2.(n-1)+3.(n-2)++(n-1). 2+n .1.