Domain #x^24x21# is a polynomial I don't need to worry about dividing by zero or taking even roots or negative numbers or other weirdness The domain is all real numbers (The interval #(oo, oo)# Range This may depend on ow much you know I would graph (or at least think about the graph) of the parabola whose equation id #y=x^24x21#What is the domain?Get an answer for 'Find the domain and range of the following y = x^2 , y = sqrt(1 – x^2), y = 1/x, y = sqrt(x) , y = sqrt(4x) ' and find homework help for other Math questions at eNotes
Finding Inverse Functions Quadratic Example 2 Video Khan Academy