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Mathematics 25 Online
OpenStudy (anonymous):

What is the sum of the geometric sequence -4, 24, -144, if there are 8 terms?

OpenStudy (anonymous):

here the first term is -4, common ratio is -6, there are 8 terms so the sum= (-4)*[(-6)^8-1]/(-6-1)

OpenStudy (anonymous):

i dont understand?

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