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OpenStudy (anonymous):
Arithmetic sequence help! Medal and Fan!
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OpenStudy (anonymous):
OpenStudy (anonymous):
Another equation for the sum of an arithmetic sequence \[\frac{ n }{ 2 }(a _{1}+a _{2})\] Should be able to set them equal to each other and solve for n
OpenStudy (anonymous):
thank you i figured out the answer :)
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