$\"\"$

The functions are $\"\"$ and $\"\"$ .

The function $\"\"$ is continuous for all real values of $\"\"$ .

The composite function is $\"\"$ .

$\"\"$

The composite function is $\"\"$ .

The composite function $\"\"$ is continuous for all real values of $\"\"$ .

$\"\"$

The function $\"\"$ is continuous for all real values of $\"\"$ .