## Calculus (3rd Edition)

The domain of $\ln x$ is $(0,+\infty)$. The range of $\ln x$ is $(–\infty,+\infty)$.
The domain of $\ln x$ is $(0,+\infty)$ because the log function is not defined for negative values or zero. The range of $\ln x$ is $(–\infty,+\infty)$ because the $y$ value can take on any number.