In math, domain is a set of x values. Learn how to find domain in mathematics with help from math teacher in this free video on mathematics.
The domain of a function is the set of all possible inputs for the function. For example, the domain of f(x)=x² is all real numbers, and the domain of g(x)=1/x is all real numbers except for x=0. We can also define special functions whose domains are more limited.