Observe the graph :

The function is $\"\"$ .

$\"\"$ is increasing on $\"\"$ .

Support numerically :

Construct the table by using the values of $\"\"$ in each interval.

The interval $\"\"$ :

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

Observe the above table, $\"\"$ is increasing on $\"\"$ .

$\"\"$ is increasing on $\"\"$ .