## Calculus 10th Edition

$f(x)$ has one vertical asymptote at $x=6.$ Vertical asymptotes are not removable.
The only restriction of the domain is that $x\ne6:$ $\lim\limits_{x\to6^-}f(x)=-\infty;\lim\limits_{x\to6^+}f(x)=\infty.$ Hence there is a vertical asymptote at $x=6.$ Vertical asymptotes are not removable.