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OpenStudy (sanchez9457):
Does the series diverge or converge? What test Gould I use? (((-1)^n )((2)^n))/n^3) This is really bugging E and it's not letting me sleep! Please help!!
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OpenStudy (anonymous):
which series???
OpenStudy (sirm3d):
\[\large\frac{(-1)^n 2^n}{n^3}\]
OpenStudy (sirm3d):
ratio test shouldwork here.
OpenStudy (sanchez9457):
Got it! Thanks!
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