The sum of infinite series `|[1,2],[6,4]|+|[1/2,2],[2,4]|+|[1/4,2],[2/3,4]|+..............`is

Find the sum of the infinite series. 1/(1.2)+1/(2.3)+1/(3.4)+...

Sum of infinite terms of series 3+5. 1/4+7. 1/4^2+..... is

FInd the sum of infinite terms of the series 1/(1.2.3)+1/(2.3.4)+1/(3.4.5).....

Find the sum of the infinite series. 1/(1.2.3)+1/(2.3.4)+1/(3.4.5)+...

FInd the sum of infinite terms of the series (1)/(1.2.3)+(1)/(2.3.4)+(1)/(3.4.5)....

Sum of infinite terms of series 3 + 5. 1/4 + 7. 1/4^2 + .... is

The sum of the series 1/1.2-1/2.3+1/3.4-1/4.5+ ... is

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