$\"\"$

The logarithm equation is $\"\"$ .

$\"\"$

Definition of logarithm : $\"\"$ if and only if $\"\"$ .

$\"\"$

Check logarithm equation at $\"\"$ .

Substitute $\"\"$ in $\"\"$ .

$\"\"$

Power property of logarithm : $\"\"$ .

$\"\"$

Apply property of logarithm : $\"\"$ .

$\"\"$

The logarithm equation exist at $\"\"$ .

$\"\"$

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