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posted by Josh on Wednesday, May 2, 2012 at 3:22pm.
For the arithmetic series 13+19+... a. find tsub27 b. find Ssub27 c. if tsubn = 445, find n
a=13 d=6 T27 = 13+26*6 = 169 S27 = 27/2 (2*13 + 26*6) = 2457 445 = 13 + (n-1)6 n=73
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