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OpenStudy (anonymous):
1. The first term of an arithmetic series is 5 and the 22nd term is 68. Find the sum of the series. 2. In an arithmetic sequence the first term is -4 and the 29th term is 164. Find d.
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hartnn (hartnn):
hi @nicolenrs72 do you have the formulas for n'th term and sum in arithmetic series ?
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