$\"\"$

\

(a).

\

The equation is $\"\"$ .

\

The logarithmic formula : $\"\"$ .

\

$\"\"$

\

Raise the power to the base $\"\"$ on both sides.

\

$\"\"$

\

The logarithmic formula : $\"\"$ .

\

$\"\"$ .

\

Add $\"\"$ to each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$ is undefined when $\"\"$ , Hence $\"\"$ is not a valid solution.

\

Therefore, the value of $\"\"$ .

\

$\"\"$

\

(b).

\

The equation is $\"\"$ .

\

The quotient rule of logarithmic : $\"\"$ .

\

$\"\"$ .

\

Raise the power to the base $\"\"$ on both sides.

\

$\"\"$

\

$\"\"$

\

The logarithmic formula : $\"\"$ .

\

$\"\"$

\

Multiply each side by $\"\"$ .

\

$\"\"$

\

The value of $\"\"$ .

\

$\"\"$

\

(a). The value of $\"\"$ .

\

(b). The value of $\"\"$ .