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Mathematics 21 Online
OpenStudy (anonymous):

Please help!...find Sn for the given arithmetic series. a1=22 d=-8 n=21 a. 1911 b. -1449 c.-2436 d. -1218

OpenStudy (anonymous):

not sure what the question is sorry? a1 d=-8 n=21 ????????

OpenStudy (anonymous):

i have to solve for Sn (n is written below the S)

OpenStudy (anonymous):

Sn????? whats that?

OpenStudy (anonymous):

lol your asking the wrong person!

OpenStudy (anonymous):

will its a abbreviation for something ?

OpenStudy (anonymous):

ok...Sn is abbreviation for finding "sequences!" here is the formula|dw:1343754276783:dw|

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