The function is $\"\"$ .

All possible values of $\"\"$ is the domain of the function.

Above function is a radical function.

The expression under the square root (the radicand) must be nonnegative $\"\"$ .

$\"\"$ .

Solve the inequality $\"\"$ .

$\"\"$

$\"\"$ .

Since $\"\"$ has no real solutions, the domain of the function is all real numbers.

The domain of the function $\"\"$ is all real numbers.