$\"\"$

The infinite geometric sequence is $\"\"$

Find the common ratio.

The common ratio $\"\"$ is $\"\"$ ,Then $\"\"$ .

The infinite geometric series has a sum.

Find $\"\"$ .

For $\"\"$ :

$\"\"$

The sum of an infinite geometric series is $\"\"$ .

The general formula of sum of an infinite geometric series $\"\"$ .

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

$\"\"$

Sum of an infinite geometric series is $\"\"$ .

$\"\"$

Sum of an infinite geometric series $\"\"$ is $\"\"$ .