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OpenStudy (anonymous):
PLEASE HELP! What is the 9th term of the geometric sequence -1, 3, -9, ...? -59,049 -6,561 2,187 19,683
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OpenStudy (anonymous):
\[a _{n} = -1(-3)^{n-1}\] let n = 9
OpenStudy (anonymous):
well i got -6,561
OpenStudy (anonymous):
that seems right :)
OpenStudy (anonymous):
ok cool :] thanks
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