Thread: show this series diverge
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Old July 3rd, 2009, 04:58 PM
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Quote:
Originally Posted by wellfed View Post
given a_n > 0 and lim(n a_n) = L with L \ne 0 show the series \Sigma a_n diverges.
It should be clear to you that L>0.
Use the limit comparsion test and compare a_n with \frac{1}{n}.
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