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OpenStudy (anonymous):
what is the seventh turn off the geometric sequence where a1 = -5 and a5 = -1,280?
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OpenStudy (anonymous):
a5 = a1 * r^4 -1280 = -5 * r^4 solve for r a7 = a1 * r^6
OpenStudy (anonymous):
5120?
OpenStudy (anonymous):
It should be negative.
OpenStudy (anonymous):
i got it its -20,480!:)
OpenStudy (anonymous):
good.
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