Learn how to write the domain of a radical function

The video tutorial explains how to determine the domain of a function by solving inequalities involving the radicand. It covers the use of interval notation, emphasizing the inclusion and exclusion of values using brackets and parentheses. The concept of infinity in interval notation is also discussed, highlighting that infinity is not a number and cannot be included.

Explain the significance of including or excluding values in interval notation.

Why can't infinity be included in the interval notation?