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OpenStudy (anonymous):
What is the sum of a 22-term arithmetic sequence where the first term is 54 and the last term is -30
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OpenStudy (anonymous):
a. 264 b. 288 c. 312 d. 336
OpenStudy (anonymous):
a=54 ,L=-30 Sn=n/2[a+l] s22=22/2[54+-30]=264----->(a)
OpenStudy (anonymous):
Thanks!
OpenStudy (anonymous):
yw!
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