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Mathematics 11 Online
OpenStudy (anonymous):

Find Sn for the given arithmetic series. a[1]=22, d=-8, c=21 a. 1911 b. -1449 c. -2436 d. -1218

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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