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Asked by Micheal

Find a12 in a geometric series for which a12 = 32 and r= -4
3 years ago

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Answered by oobleck
Hmmm. I'd say a12=32.

Maybe fix your typo and use the usual formula
an = ar^(n-1)

also, I think you meant geometric sequence, not series. The series is the sequence of partial sums,
3 years ago
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Find a12 in a geometric series for which a12 = 32 and r= -4

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