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OpenStudy (kingj):
What is the sum of the geometric sequence –3, 18, –108, … if there are 8 terms?
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OpenStudy (anonymous):
Well, the sequence is the last number, cubed, times -1, so either find an equation for that or just do the math, find the first 8 numbers, and add them together.
OpenStudy (kingj):
ok but I need the answer just incase i get it wrong
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