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7. Find S 14 for the arithmetic sequence. 101+98+95+92+..

7. Find S 14 for the arithmetic sequence. 101+98+95+92+..
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7. Find S 14 for the arithmetic sequence. 101+98+95+92+..

User Reza Heydari
by
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1 Answer

2 votes

Explanation:


S _(n) = (n)/(2) (2a + (n - 1)d) \\ S _(14) = (14)/(2) ((2 * 101) + (14 - 1) * -3) \\ =1,141

User Markell
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