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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)
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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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