## Precalculus (6th Edition) Blitzer

As $x\to {{3}^{+}}$ , $f\ \left( x \right)\to \ \infty$
We can see that there is an asymptote at $x\ =\ -3$. The limit, $x\to -{{3}^{+}}$ implies the right-hand side of $x$ as $x$ approaches $-3$. Therefore, from the graph as $x\ \to \ -{{3}^{+}}$ , $f\left( x \right)\ \to \ \infty$