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Mathematics 18 Online
OpenStudy (anonymous):

find the geometric series

OpenStudy (anonymous):

\[\sum_{x-1}^5{1/4*2^n-1}\]

OpenStudy (anonymous):

<img src=" http://media.education2020.com/evresources/648-12-04-00-00_files/i0200000.jpg " alt="648-12-04-00-00_files/i0200000.jpg"/>

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