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OpenStudy (anonymous):
Use the formula to evaluate the infinite series. 25+5+1+...
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OpenStudy (anonymous):
the formula is
OpenStudy (anonymous):
|dw:1375808231984:dw|
hartnn (hartnn):
a1 = 1st term = 25 can you find the common ratio =r =... ?
OpenStudy (anonymous):
would it be 5
hartnn (hartnn):
the common ratio is next term/ current term = 5/25 = ... ?
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OpenStudy (anonymous):
5/25=0.20
hartnn (hartnn):
yeah, use that
OpenStudy (anonymous):
|dw:1375810878500:dw|
OpenStudy (anonymous):
So then the answer would be 31.25
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