SOLUTION: find the sum S8 for the geometric series 6-1.8+0.54-0.162+...

Question 997593: find the sum S8 for the geometric series 6-1.8+0.54-0.162+...
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!
6-1.8+0.54-0.162+...







So there is a common ratio of -0.3.  This is a geometric 
series with r=-0.3 and first term a₁=6.

Substitute those with n=8 in the sum formula:











Edwin

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