How to determine the domain of a rational function - domain and range

The video tutorial explains how to find the domain of rational functions, particularly when a root is in the denominator. It covers the concept of domain, using examples like 3/X and 1/sqrt(X-3), and discusses how to handle division by zero and square roots. The tutorial also demonstrates solving inequalities to determine valid input values for the function.

How do you determine the domain of a function with a square root in the denominator?

What is the final domain of the function 1/sqrt(X - 3)?