$\"\"$

Observe the graph:

The limit expression is $\"\"$ .

As $\"\"$ tends to $\"\"$ from left side, the function value approaches to $\"\"$ .

As $\"\"$ tends to $\"\"$ from right side, the function value approaches to $\"\"$ .

Therefore, the limit does not exist.

$\"\"$ does not exist.

$\"\"$

$\"\"$ does not exist.