Arithmetic Series PS Question

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Arithmetic Series PS Question

by dunnec3 » Fri Dec 04, 2015 3:48 am
In the arithmetic sequence t1, t2, t3,......tn = 23 and tn = t(n-1) - 3 [(n-1) is supposed to be subscript as in term t(n-1)] for each n>1. What is the value of n for tn = -4

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