Question
$f : \mathbb{R} \rightarrow \mathbb{R}$ and $g : [0, \infty) \rightarrow \mathbb{R}$ are defined by $f(x) = x^2$ and $g(x) = \sqrt{x}$. Which one of the following is not true?
$f : \mathbb{R} \rightarrow \mathbb{R}$ and $g : [0, \infty) \rightarrow \mathbb{R}$ are defined by $f(x) = x^2$ and $g(x) = \sqrt{x}$. Which one of the following is not true?