Now the range is the y value notice that 3 x 2 is always a negative number thus y 0. So the domain in set builder notation is x 3 x 4. Though not as compact as interval notation it is a way that mathematicians use to convey two important pieces of information.
How we write sets that make up the domain and range of functions often depends on how the relation or function are defined or presented to us.
Though not as compact as interval notation it is a way that mathematicians use to convey two important pieces of information. Set the denominator to zero and solve for x. As for the range we look at the y values. Another way is to assign the interval x.