I'm pretty sure i do something wrong here, i get both limits to 0. Any help would be greatly appreciated!

$\displaystyle \lim\frac{4n+1}{\sqrt{4n^2-3}}$ and $\displaystyle \lim\sqrt{n^2-3n}-n$

n->infinity (for both, couldnt figure out how to add it to the lim with the latex)