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OpenStudy (anonymous):
Check my answer??? Find S5 for the series -2 + -10 + -50 + -250 +... I think it's -1250
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OpenStudy (freeg13):
so far it is 208
OpenStudy (anonymous):
what?
OpenStudy (freeg13):
when your adding negatives you change the signs like instead of -2 + -10 you do 2 - 10 it is the same answer just easier.
OpenStudy (anonymous):
okay but I thought the 5th one in the series was -1250
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