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1.      What is the sum of the first 8 terms of the geometric series?

120 - 80 +160/3 - 320/9 + ...

 Feb 8, 2020
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SUM = (F * (1 - R^N) / (1 - R))

 

           =(120 * [(1 - (-2/3^8))/ (1 - (-2/3))]

          =50,440 / 729

 
 Feb 8, 2020

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