## Precalculus (6th Edition) Blitzer

As $x\to {{1}^{+}}$ , $f\left( x \right)\to \infty .$
The vertical asymptote is $x=1$ and the function $f\left( x \right)$ increases without bound as $x$ approaches to $1$ from the right side. Thus, the function $f\left( x \right)$ tends to $\infty$ as $x\to {{1}^{+}}$.