$\"\"$

The given values are $\"\"$ .

Apply alternative formula for sum of a geometric series $\"\"$ .

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

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Product of two same signs is positive) $\"\"$

$\"\"$ (Add denominator: 1 + 5 = 6)

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

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

$\"\"$ (Divide: $\"\"$ ) $\"\"$

The value of $\"\"$ .