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OpenStudy (anonymous):
What is the sum of the geometric sequence -4, 24, -144, ... if there are 7 terms? -159,964 -26,661 26,661 159,963 thanks :]
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OpenStudy (anonymous):
So first off, we got a1=-4 We also got n=7
OpenStudy (anonymous):
Now all you need to do is plug into the following formula:|dw:1338943917241:dw|
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