SOLUTION: For the geometric series: 8+2+1/2+1/8+... find S1,S2,S3,S4 and S5. I alread found that S1=8, S2=10, S3=10 1/2, but I need S4 and S5. I also need to use these sums to approximate

Question 450317: For the geometric series:
8+2+1/2+1/8+...
find S1,S2,S3,S4 and S5. I alread found that S1=8, S2=10, S3=10 1/2, but I need S4 and S5. I also need to use these sums to approximate S. Then I need to use the Infinite Geometric Series formula, which is S=S1/r-1, to find S.
S1= 8, because its the first number in the series
R= the common ratio, which I don't know

Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!

The formula for the sum of an infinite geometric series is , where -1 < r <1. Here r = 1/4. Hence
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