$\"\"$

\

The function is $\"\"$ .

\

$\"\"$ (Original function)

\

$\"\"$ (Set the denominator equal to zero)

\

$\"\"$ (Subtract $\"\"$ from each side)

\

$\"\"$ (Apply additive inverse property: $\"\"$ )

\

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

\

The excluded value is $\"\"$ .