Chapter 5.3, Problem 151E

For each of the following sequences, if the divergence test

applies, either state that $\underset{n\to \infty }{\lim }{a}_n$ a does not exist or find

   $\underset{n\to \infty }{\lim }{a}_n$ . If the divergence test does not apply, state why.

151. $a_n=\frac{{\left(\ln n\right)}^2}{\sqrt{n}}$