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OpenStudy (anonymous):
What is the sum of a 30–term arithmetic sequence where the first term is 73 and the last term is –101?
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OpenStudy (anonymous):
a1 = 73 , nth term, an = -101 n = 30 by applying formula sum of arithmetic sequence = (n/2)(a1+an), sum = (30/2)*(73-101) = 15*-28 = -420
OpenStudy (anonymous):
Thank You (:
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