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The sum of a geometric series whose first three terms are 8000, -12000, and 18000 is 57875. What is the last term of the series?

 Feb 4, 2019
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8,000, -12,000, 18,000, -27,000, 40,500, -60,750, 91,125 =57,875.

 Feb 4, 2019

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