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Mathematics 22 Online
OpenStudy (anonymous):

The sum of an arithmetic series with 26 terms is 286. If the first term is 39, find the last term.

OpenStudy (anonymous):

\[\S_n=\frac{n}{2}(a_{1}+a_{n})\] \[286=\frac{26}{2}(39+a_n)\] solve for a_n

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