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OpenStudy (anonymous):
Find the sum of the infinite series 3 + 1.2 + 0.48 + 0.192 + ...if it exists.
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OpenStudy (anonymous):
it exists
OpenStudy (anonymous):
\[S_\infty=\frac{ a }{ 1-r }\]
OpenStudy (anonymous):
a=3,r=0.4 just substitute the values
OpenStudy (anonymous):
it comes out to be 5
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