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OpenStudy (anonymous):
What is the sum of the geometric sequence -4, 24, -144, … if there are 8 terms? ASAP
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OpenStudy (anonymous):
i only need the answer
OpenStudy (bernice):
What's happening here is -4 + 4(6) - 4(6)(6) + 4(6)^3 - 4(6)^4 + .... for 8 terms :) Now you add them :p
OpenStudy (anonymous):
umm
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