$\"\"$

\

(a)

\

The exponential equation is $\"\"$ .

\

Apply $\"\"$ on each side.

\

$\"\"$

\

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

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

(b)

\

The exponential equation is $\"\"$ .

\

Apply $\"\"$ on each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

(a) $\"\"$ .

\

(b) $\"\"$ .