SOLUTION: Find the sum of the first 70 terms of the series: 17+23+29+35+...

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Question 1000794: Find the sum of the first 70 terms of the series: 17+23+29+35+...
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the sum of the first 70 terms of the series: 17+23+29+35+...
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Arithmetic Series with a(1) = 17 and d = 6
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a(70) = 17 + 69*6 = 431
S(70) = (70/2)(17+431) = 35(448) = 15680
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Cheers,
Stan H.
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