$\"\"$

The series is $\"\"$ .

Divergence test: For the series $\"\"$ , If $\"\"$ , then the series $\"\"$ is divergent.

Here $\"\"$ .

Find the common ratio.

When $\"\"$ then $\"\"$ .

Therefore the common ratio is $\"\"$ .

$\"\"$ .

Since $\"\"$ the series diverges.

$\"\"$

The series is divergent.