Answer
$\displaystyle \lim_{x\rightarrow+\infty}f(x)=+\infty$
Work Step by Step
Evaluating the function for some x's, letting x become greater and greater , we build a table
we see that
f(x) is becoming arbitrarily large as x$\rightarrow\infty$,
We also say that $\displaystyle \lim_{x\rightarrow\infty}$f(x) diverges to +$\infty$, or just
$\displaystyle \lim_{x\rightarrow+\infty}f(x)=+\infty$
