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OpenStudy (anonymous):
What is the sum of a 30-term arithmetic sequence where the first term is 71 and the last term is -103?
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OpenStudy (ajprincess):
Sum=n(a+l)/2 a-first term, l-last term and n-number of term.
OpenStudy (anonymous):
Thank you!
OpenStudy (ajprincess):
yw. :)
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