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

Question 887117: 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 thought my ratio was 2 since that is what n is being multiplied by. But that didn't work. I also tried 1/2 but that didn't work either.
Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!

 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

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