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OpenStudy (anonymous):
What is Sn for the arithmetic series in which a1 = 8 and a60 = 96.5?
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OpenStudy (amistre64):
do you recall the general formula for an arithmetic sequence?
OpenStudy (amistre64):
also the formula for the sum of the sequence is:\[\frac{n}{2}(a_1+a_n)\] which i spose is all we need since they give us a1 and an for n=60 :/
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