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OpenStudy (anonymous):
Find the sum of the following infinite geometric series, if it exists.
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OpenStudy (anonymous):
\[S = \frac{ a }{ 1-r }\]
OpenStudy (anonymous):
\[\frac{ 1 }{ 2 },\frac{ 1 }{ 4 },\frac{ 1 }{ 8 },\frac{ 1 }{ 16 }\]
OpenStudy (amoodarya):
s=a+ar+ar^2+ar^3+... multiply s and r rs =ar+ar^2+... subtract s and sr you find the answer
OpenStudy (amoodarya):
|r|<1 this is Necessary
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