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OpenStudy (anonymous):
Find the sum of the geometric series in which a1=8 and r= -1/2
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OpenStudy (dumbcow):
\[s = \frac{a(1-r^{n})}{1-r}\]
OpenStudy (dumbcow):
how many terms are there or is it an infinite series?
OpenStudy (anonymous):
for an infinte series sum is a/(1-r)
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