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OpenStudy (anonymous):
Find the general term a n for the geometric sequence a1=-4 and a2=20
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OpenStudy (cwrw238):
common ratio r = a2/a1 = -5 nth term = a1 r^(n- 1)
OpenStudy (cwrw238):
plug in values of a1 and r
OpenStudy (anonymous):
An=20?
OpenStudy (anonymous):
I am very confused on what to do with ^n-1
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