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OpenStudy (anonymous):
The first term in an arithmetic series is 9, while the last term in the series is –191. If there are 25 terms in the series, what is its sum? A)-4550 B)-2275 C)2275 D)4550
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OpenStudy (anonymous):
sum = n/2[9 + -191] 12.5 * -182 = -2275
OpenStudy (anonymous):
B
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