**How To Do Set Notation And Interval Notation**. A b is the interval notation. The square bracket to the left of 5 is called an inclusive bracket.

In interval notation this set of numbers would look like this. 2 U 3 We used a U to mean Union the joining together of two sets. Usually youll see it when you learn about solving inequalities because for some reason saying x 3 isnt good enough so instead theyll want you to phrase the answer as the solution set is x x is a real number and x 3 How this adds anything to the students understanding I dont know.

### 1 3 5 1 3 5 Remember that when writing or reading interval notation using a square bracket means the boundary is included in the set.

Determine the interval notation after graphing the solution set on a number line. I believe it was to do with linear algebra and matrices. X 1 x 3 or x 5 x 1 x 3 or x 5 Interval notation. You never know when set notation is going to pop up.