How do you find the domain and range of #g(x)=sqrt(x^2-4)#?
Range: All real numbers or
Domain refers to all the x-values on the graph.
In a square root function, to get real x-values, we need it to be
Range refers to all the y-values on the graph. Since all the values must be greater than or equal to 0, that means that the range is all real numbers, or
Here is the graph of this function (there should be arrows at the ends of the graph):