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August 21, 2014

Homework Help: Math-Gr.11 urgent

Posted by Mae on Sunday, January 4, 2009 at 10:58pm.

The 10th term of an arithmetic series is 34, and the sum of the first 20 terms is 710. Determine the 25th term.

Can someone please explain how to do this? I don't know which formula to use. TIA

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