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OpenStudy (anonymous):
Find the indicated sum for the arithmetic series. S18 for 13 + 2 + (-9) + (-20) + ...
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OpenStudy (anonymous):
what's the difference?
OpenStudy (anonymous):
What do you mean?
OpenStudy (anonymous):
difference between each subsequent term?
OpenStudy (anonymous):
I have no idea.
OpenStudy (anonymous):
what do you have to add to get to next term 13 9 -2 -20
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OpenStudy (anonymous):
I'm sorry, but I'm very confused.
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