Physics - Calculus Question with Solution | TestHub

The given expression for $P$ is $P=\frac{Q^2-4}{Q-2}$. A rational function is undefined when its denominator is zero.

Setting the denominator to zero, we get $Q-2=0$, which implies $Q=2$. At this value, the expression becomes $\frac{0}{0}$, which is an indeterminate form, meaning $P$ is undefined in this exact form at $Q=2$.