$\"\"$

\

The function is $\"\"$ and $\"\"$ .

\

Find the value $\"\"$ .

\

Case(i): $\"\"$ .

\

$\"\"$ (Original function)

\

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

\

$\"\"$ (Simplify)

\

$\"\"$

\

Case(ii): $\"\"$

\

$\"\"$ (Original function)

\

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

\

$\"\"$ (Simplify)

\

$\"\"$ (Multiply each side by $\"\"$ )

\

$\"\"$ (Simplify)

\

Add both cases.

\

$\"\"$ .

\

$\"\"$ .

\

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

\

$\"\"$

\

$\"\"$ .