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posted by drew on Tuesday, March 5, 2013 at 9:24pm.

Find S25 for (-7) + (-2) + 3 + 8 +... A. 1,320 B. 1,325 C. 825 D. 820 I think A

I got 1325 or B) Sum(25) = (25/2)( -14 + 24(5)) = (25/2)(106) = 1325

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