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Mathematics 5 Online
OpenStudy (anonymous):

Find Sn for the given arithmetic series. 1. a1 = –26, d = –9, n = 24 2.a1= 18, d = –10, n = 12 3.a1 = 10, d = –9, n = 15 4.a1 = –22, d = –10, n = 18

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