The sum from 2 to infinite of [x^(2n)]/[n*(ln n)^2] I tried the ratio test but it got me to some nasty thing i dont know how to solve. thanks for any help in advance!
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Originally Posted by Jasonium The sum from 2 to infinite of [x^(2n)]/[n*(ln n)^2] I tried the ratio test but it got me to some nasty thing i dont know how to solve. Use the root test. $\displaystyle \sqrt[n]{{\left| {a_n } \right|}} = \frac{{x^2 }} {{\sqrt[n]{{n\left( {\ln (n)} \right)^2 }}}}$
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