Thread: show this series diverge
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Old July 3rd, 2009, 04:42 PM
wellfed wellfed is offline
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Default show this series diverge
Hi I am stuck on the following problem, your help is greatly appreciated.

given a_n > 0 and lim(n a_n) = L with L \ne 0 show the series \Sigma a_n diverges.
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