$\"\"$

\

The series is $\"\"$ .

\

consider $\"\"$ .

\

Apply the limits.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

If $\"\"$ then $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Therefore, the series $\"\"$ is diverges.

\

$\"\"$

\

The series $\"\"$ is diverges.