Sunday, March 20, 2016

calculus - How can I show that sumlimitsin=2nftyfrac1nlnn is divergent without using the integral test?

How can I show that n=21nlnn is divergent without using the integral test?



I tried using the comparison test but I could not come up with an inequality that helps me show the divergence of a series. I also tried using the limit comparison test but I was not successful.



Please do not give me solutions; just a hint so that I can figure it out myself.

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