shklrediaSto0rshirc shklrediaSto0rshirc

27-09-2016
Mathematics

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Find the sum of the first 40 terms of the arithmetic series: -5, -4, -3, -2, -1, … 580 600 620 640

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CaptainBeyond CaptainBeyond

29-09-2016

I don't think it's possible, because the terms are not changing by the same amount each time. At first they change by 1, then they change by 20. With arithmetic series they need to have a COMMON DIFFERENCE. If it's not common then it won't work.

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