SOLUTION: What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90? -813 -790 -765 -714

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Question 772921: What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90?

-813
-790
-765
-714
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90?
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S(17) = (17/2)(6 + (-90))
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S(17) = (17/2)(-84)
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S(17) = 17*(-42) = -714
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Cheers,
Stan H.
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-813
-790
-765
-714