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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):
I have: n/2(73+(-101) but I cant figure out how to find "n" or the difference of the terms
OpenStudy (cwrw238):
sum = (n/2(a1 + l)
OpenStudy (anonymous):
|dw:1345044342259:dw|
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