The sum to infinity of the series `1/2.4+1/4.6+1/6.8+1/8.10+.......` is

The sum to infinity of the series 1+2/3+6/3^2+14/3^4+...is

The sum to infinity of the series 1+2/3+6/3^2+10/3^3+14/3^4+....

Find the sum to infinity of the following series : 1-3/2+5/4-7/8+ .........

Find the nth term sum of n terms and sum to infinity terms of the series (1)/(2.5)+(1)/(5.8)+ (1)/(8.11)+ ...

The sum to infinity of the series 1+2/3+6/(3^2)+(10)/(3^3)+(14)/(3^4). . . . . . is (1) 2 (2) 3 (3) 4 (4) 6

The sum to infinity of the series 1+2/3+6/(3^2)+(10)/(3^3)+(14)/(3^4). . . . . . is (1) 2 (2) 3 (3) 4 (4) 6

If the sum to infinity of the series: 3+(3+d).1/4+(3+2d).1/(4^(2))+ ………. Is 4 8/9 find d. Also name the series.

The sum of the series 1 + 1/(4.2!) + 1/(16.4!) + 1/(64.6!) + ....infty is