$\"\"$

The function is $\"\"$ and the interval is $\"\"$ .

To find the absolute extreme of function in given region $\"\"$ , sketch the function.

$\"\"$

Observe the graph :

$\"\"$ and $\"\"$ are absolute minimum point over the interval $\"\"$ .

$\"\"$ is absolute maximum point over the interval $\"\"$ .

$\"\"$

Minimum points are $\"\"$ and $\"\"$ .

Maximum point is $\"\"$ .