## anonymous 3 years ago find the sum of the given infinite geometric series 1+2/3+4/9... A. 6 B. 3 C. 4 D. 2

1. anonymous

$S \infty =\frac{ a }{ 1-r }$

2. anonymous

I dont know how to plug it in :/

3. anonymous

a = i st term r = common ratio ie t2/t1