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OpenStudy (anonymous):
Find S15 for the series -1 + -3 + -5 + -7 +
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OpenStudy (anonymous):
its decreasing by 2 so it will become -29
OpenStudy (anonymous):
wait thats s15?
OpenStudy (anonymous):
-29 O.o is not the answer?
OpenStudy (anonymous):
im so confused
OpenStudy (anonymous):
are there options? see the difference of 2 don't you have formulae for series equations?
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OpenStudy (anonymous):
oh its -31
OpenStudy (anonymous):
is that right?
OpenStudy (anonymous):
-29 !!!!!!!
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