Find the sum of the infinite geometric sequence `(1)/(2),(1)/(4),(1)/(8),......`

Find the sum of the infinite geometric series (1-1/3+1/3^(2)-1/3^(3)+...oo) .

Find the sum of the infinite geometric series (1+1/3+1/9+1/27+...oo) .

Find the sum of the infinite geometric series 1+3x+9x^2+27x^3+…..

Find the sum of the following geometric series: (2)/(9)-(1)/(3)+(1)/(2)-(3)/(4)+rarr5 terms

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 n terms of the arithmetic- geometric sequence.

Find the sum of the following geometric progression: 1,-1/2,1/4,quad -1/8

Find the sum of the following infinite series (1)/(2)((1)/(5))^(2)+(2)/(3)((1)/(5))^(3)+(3)/(4)((1)/(5))^(4)+...

Find the sum in the n^(th) group of sequence,(1),(2,3);(4,5,6,7);(8,9,......15);......