$\"\"$

The nth term of a geometric sequence is $\"\"$ ,

Where $\"\"$ is first term and r is common ratio.

The geometric sequence is $\"\"$ .

The first term of the sequence $\"\"$ and common ratio is r = $\"\"$ . $\"\"$

Find $\"\"$ , substitute $\"\"$ in $\"\"$ . \ \

$\"\"$

$\"\"$ (Subtract power: $\"\"$ )

$\"\"$ (Evaluate power: $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The value of $\"\"$ .