Posted by **Wren** on Saturday, July 21, 2012 at 8:00pm.

Find a4 for the arithmetic series with s4=-36 and a1=9

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March 24, 2017
Posted by **Wren** on Saturday, July 21, 2012 at 8:00pm.

Find a4 for the arithmetic series with s4=-36 and a1=9

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