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Mathematics 11 Online
OpenStudy (anonymous):

what is the sum of a 17-term arithmetic sequence where the first term is 9 and the last term is -87

OpenStudy (anonymous):

@mathstudent55 please help me

OpenStudy (anonymous):

@goformit100 help please?

OpenStudy (goformit100):

|dw:1375750913304:dw| where n= 17, a= first term, l= last term.

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