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OpenStudy (anonymous):
Find the 8th term of the geometric sequence: 1, -2, 4, -8, ...
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OpenStudy (amistre64):
-1 2(n-1)
OpenStudy (anonymous):
-128
OpenStudy (amistre64):
missed the exp
OpenStudy (amistre64):
an = (-1)^(n-1) 2(n-1)
OpenStudy (amistre64):
its not that .... getting closer
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OpenStudy (anonymous):
an=a1*r^(n-1)
OpenStudy (anonymous):
a8=1*(-2)^7
OpenStudy (anonymous):
that's it.
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