SOLUTION: I need to find the sum of the series (1/2^n) from 1 approaching infinity. I used the formula a/1-r my first term is 1/2 and Im having difficulty finding my ratio. I first th

Algebra ->  Sequences-and-series -> SOLUTION: I need to find the sum of the series (1/2^n) from 1 approaching infinity. I used the formula a/1-r my first term is 1/2 and Im having difficulty finding my ratio. I first th      Log On

 does work!

You are talking about 

Certainly the common ratio is  because any term after the first
divided by the preceding term is always 

, with , 

.

Edwin