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OpenStudy (anonymous):
What is the sum of a 17–term arithmetic sequence where the first term is 6 and the last term is –90??
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OpenStudy (dumbcow):
sum of arithmetic sequence: Sn = n(A1 + An)/2 A1 = 6 An = -90 n=17
OpenStudy (anonymous):
Thank you!
OpenStudy (anonymous):
Wait i got it wrong somehow
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