Answer
$\color {red} {\text{Domain of a Square Root Function}}$
Work Step by Step
$\text{Explanation:}$
The $\color {red} {\text{Domain of a Square Root Function}}$ is set of all values of $\color {blue} {x} $ for which the expression under the radical sign $\color {brown} {\surd} $ must be Greater than or equal to Zero.
$\text{For Example:}$
Consider the Square Root Function is $y=\sqrt x$
So the Domain of $f$ is $x\ge 0$.