Step 1 :

The expression is $\"\"$ .

Apply change of base formula : $\"\"$ , where $\"\"$ .

$\"\"$

Again apply change of base formula : $\"\"$ , where $\"\"$ .

$\"\"$

Property of logarithmic : $\"\"$ , where $\"\"$ .

$\"\"$ .

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

Solution :

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