$\"\"$

The series is $\"\"$ , if $\"\"$ .

The sum of $\"\"$ -terms in geometric progression.

Find the missing property sequence.

The common ratio is $\"\"$

The general formula of $\"\"$ -term sum of a geometric series $\"\"$ .

Find $\"\"$ .

Substitute $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .