Answer
$f(x)$ has one vertical asymptote at $x=6.$
Vertical asymptotes are not removable.
Work Step by Step
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.
