$\"\"$

The differential equation is $\"\"$ .

The function is $\"\"$ .

Apply derivative on each side with respect to $\"\"$ .

$\"\"$

Consider $\"\"$ .

Substitute $\"\"$ and $\"\"$ in the above equation.

$\"\"$

Hence $\"\"$ .

The function $\"\"$ is not a solution of the differential equation.

$\"\"$

The function $\"\"$ is not a solution of the differential equation.