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Use Sigma notation to represent the series, algebra homework help

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1) Use Sigma notation to represent the series below.2 + 5 + 8 + 11 + 14 + 17A. B.C.D.2) Find the sum of the arithmetic series.a) 25b) 126c) 133d) 1193) Find a1 if d = 4, a20 = 82, and S20 = 880.a) 2b) 4c) 6d) 604) Find a1 if d = 2.5, a15 = 33.5, and S15 = 240.a) 2.5b) -1.5c) -4d) -2.55) Find the sum of the arithmetic series shown below.a) 11187b) 11300c) 11074d) 11211

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