# Chapter 1 - Limits and Their Properties - Review Exercises: 59

$f(x)$ is continuous over the interval $[4, \infty).$

#### Work Step by Step

The only restriction on $f(x)$ is that the radicand has to be positive $\to x-4\ge0\to x\ge4\to f(x)$ is continuous over the interval $[4, \infty).$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.