How to find domain and range on graphing calculator?
The domain is whatever you define it to be; that is, you could say f(x)=x² with x an integer only: you need to specify the domain when giving a function. Typically (at least in introductory math courses) it is assumed that the domain of a function f(x) is all real numbers x for which f(x) is a real number. Typically given that assumption, you need to find out the domain yourself: if there’s a radical of even power and you’re not involving complex numbers, you need to solve for when the radicand is negative; if there’s a rational function, you need to solve for when the denominator is zero; if there’s a tangent, cotangent, secant, or cosecant function, you need to solve for its undefined values; if there’s a logarithmic function, you need to solve for when its argument is negative. Finding the range (given a domain, of course) is not necessarily a straightforward process. Your best bet will be to look at the graph, as Commander Rachek suggested.
