$\"\"$

\

The statement is $\"\"$ .

\

Consider $\"\"$ . $\"\"$ .

\

Consider $\"\"$ .

\

The function $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

The functoion $\"\"$ is an odd function.

\

If $\"\"$ is an odd function, then $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Consider $\"\"$ .

\

The function $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

The function $\"\"$ is an even function.

\

If $\"\"$ is an even function, then $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Consider $\"\"$ .

\

The function $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

The function $\"\"$ is an odd function.

\

If $\"\"$ is an odd function, then $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Consider $\"\"$ .

\

The function $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

The function $\"\"$ is an even function.

\

If $\"\"$ is an even function, then $\"\"$ .

\

$\"\"$ .

\

Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ in $\"\"$ . $\"\"$ $\"\"$ $\"\"$

\

The statement is true.

\

$\"\"$

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The statement is true.