The function is $\"\"$ .

Analyze graphically:

Observe the graph.

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

Support numerically:

Construct a table that shows the values to investigate the function values as of $\"\"$ increases.

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

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

Observe the table:

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

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