$\"\"$

The function is $\"\"$ .

Graph the function $\"\"$ is : \ \

$\"graph$

Observe the above graph :

The function is symmetric with respect to the y - axis.

So, the given function is an even function. $\"\"$

Confirm algebraically : \ \

If $\"\"$ then function $\"\"$ is an even and if $\"\"$ then function $\"\"$ is an odd.

The function is $\"\"$ .

$\"\"$ \ \

Substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

The function is even by the algebraically. $\"\"$

The function is an even function.