Mathematics, 30.03.2021 08:30 pg67891012345
8) How many terms of the arithmetic sequence (2, 4, 6, 8, ...} will give a sum of 600? Plz answer
Answers: 2
![S_n = \frac{n}{2}[2a + (n - 1)d]](/tpl/images/1229/5136/7da82.png)
![600 = \frac{n}{2}[2*2 + (n - 1)*2]](/tpl/images/1229/5136/c8587.png)
![600 = \frac{n}{2}[4 + 2n - 2]](/tpl/images/1229/5136/40379.png)
![120 = n[2 + 2n]](/tpl/images/1229/5136/b5ee2.png)
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8) How many terms of the arithmetic sequence (2, 4, 6, 8, ...} will give a sum of 600?
Plz answer...
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