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Mathematics 10 Online
OpenStudy (anonymous):

Please help! An arithmetic series begins with −8 and ends with 148. The series has a sum of 980. How many terms are in the series?

OpenStudy (anonymous):

use the formula Sn = n/2 * [a + l] where s = sum,a = first term, and l = last term and solve for n

OpenStudy (anonymous):

correction Sn = sum (=980)

OpenStudy (curry):

14 terms

OpenStudy (curry):

is the answer

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