$\"\"$ \ \

The function $\"\"$ . \ \

Show that $\"\"$ is continuous on $\"\"$ .

For a function to be continuous, $\"\"$ .

Let $\"\"$ and $\"\"$ .

$\"\"$ and $\"\"$ .

Find $\"\"$ .

$\"\"$

$\"\"$ .

Hence the function is continuous for all real number.

The function $\"\"$ is continuous on $\"\"$ .

$\"\"$

The function $\"\"$ is continuous on $\"\"$ .