Stuck on number 37. Do I do lhopitals rule taking the derivative on the top and bottom seperately?
$\displaystyle \displaystyle \begin{align*} \frac{2n}{\sqrt{n^2 + 1}} &= \frac{\frac{2n}{n}}{\frac{\sqrt{n^2+1}}{n}} \\ &= \frac{2}{\frac{\sqrt{n^2+1}}{\sqrt{n^2}}} \\ &= \frac{2}{\sqrt{\frac{n^2+1}{n^2}}} \\ &= \frac{2}{\sqrt{1 + \frac{1}{n^2}}} \end{align*}$