Find the Domain of \(f(x)=\dfrac{|x|-2}{|x|-3}\)
Question
Find the domain of the function
\[ f(x)=\frac{|x|-2}{|x|-3} \]Solution
Given
\[ f(x)=\frac{|x|-2}{|x|-3} \]For the function to be defined, the denominator must not be zero.
Therefore,
\[ |x|-3\ne0 \] \[ |x|\ne3 \]Hence,
\[ x\ne3 \quad \text{and} \quad x\ne-3 \]Thus all real numbers except \(-3\) and \(3\) belong to the domain.