$\"\"$

The series is $\"\"$ .

Rewrite the series as $\"\"$ .

$\"\"$ -series test:

The $\"\"$ -series $\"\"$ is convergent if $\"\"$ and divergent $\"\"$ .

The series $\"\"$ is in the form of $\"\"$ -series.

Here $\"\"$ .

Therefore, the series is diverges.

$\"\"$

The series $\"\"$ is diverges.