Answer to Question #294256 in Calculus for Nofiupelumi

Question

Find the domain and range of function f(x)=√(x^2-4) on R

Answer 1

Domain: $x^2-4\ge0 \;or\; x \in (-\infin,-2]\cup [2,\infin).$

Range: $f(x)\ge0\;or\; f(x) \in [0,\infin).$