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OpenStudy (jojokiw3):
Please someone help with convergence ratio question.
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OpenStudy (jojokiw3):
\[\sum_{n=1}^{\infty} \frac{ (2c)^n }{ n5^n }\] converges for |c| < __________?
OpenStudy (anonymous):
\[\lim_{n \rightarrow \infty}\left| \frac{ a _{n+1} }{ a _{n} } \right|\]
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