Mathematics, 13.01.2021 16:00 bri2576
For the arithmetic sequence beginning with the terms {5, 6, 7, 8, 9, 10...}, what is the sum of the first 17 terms
Answers: 2
![S=\frac{n}{2} [2a_{1}+(n-1)r]](/tpl/images/1032/0501/8c640.png)
![S=\frac{17}{2} [2(5)+(17-1)1]](/tpl/images/1032/0501/88442.png)
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For the arithmetic sequence beginning with the terms {5, 6, 7, 8, 9, 10...}, what is the sum of the...
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