Mathematics, 14.02.2021 09:10 aguilarjose
The sum of the first 15 terms of an arithmetic sequence is 480. Find the 8th term of the sequence.
Answers: 1
![S_{n}=\dfrac{n}{2}[2a+(n-1)d]](/tpl/images/1118/7515/d1276.png)
![S_{15}=\dfrac{15}{2}[2a+(15-1)d]](/tpl/images/1118/7515/65b7b.png)
![480=\dfrac{15}{2}[2a+14d]](/tpl/images/1118/7515/a2c1a.png)
![480=\dfrac{15}{2}[2(a+7d)]](/tpl/images/1118/7515/76590.png)
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The sum of the first 15 terms of an arithmetic sequence is 480. Find the 8th term of the
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