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OpenStudy (anonymous):
Find Sn for the given arithmetic series. a[1]=22, d=-8, c=21 a. 1911 b. -1449 c. -2436 d. -1218
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OpenStudy (zepp):
How would you write this in the sigma notation?
OpenStudy (anonymous):
i dont know? :/
OpenStudy (anonymous):
Pls at least attempt to find out which formula to apply !
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