$\"\"$

The function is $\"\"$ .

Graph the functions $\"\"$ and $\"\"$ .

Construct a table for different values of $\"\"$ .

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Graph:

Graph of the functions $\"\"$ , $\"\"$ and $\"\"$ :

$\"\"$

Observe the graph:

The function $\"\"$ is periodic.

$\"\"$

Graph of the functions $\"\"$ , $\"\"$ and $\"\"$ is

$\"\"$ .