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Mathematics 8 Online
OpenStudy (anonymous):

Is my answer to this question right? What is the formula for finding a specified term (an) in an arithmetic sequence? Sn = n/2 (a1 + a n)

hartnn (hartnn):

general term an of arithmetic sequence is \(\large a_n=a_1+(n-1)d\) a1 = 1st term, d= common differenc.

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