$\"\"$

\

The function is $\"\"$ , $\"\"$ .

\

Graph the function $\"\"$ :

\

$\"\"$

\

Observe the graph:

\

As $\"\"$ tends to $\"\"$ , $\"\"$ approaches $\"\"$ .

\

$\"\"$

\

Graph of the function $\"\"$ :

\

$\"\"$

\

As $\"\"$ tends to $\"\"$ , $\"\"$ approaches $\"\"$ .