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Evaluate 1 + 2/7 + 4/49 + 8/343 + ...

 Jan 18, 2021
 #1
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Common ratio, r,  is 2/7      sum is   a1 /(1-r) = 1 /(1-2/7) = 1/ 5/7 = 7/5

 Jan 18, 2021

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