## Pre-Calculus Tutorial

*Union & Intersection*

#### Intro

Union, denoted by ∪, means the inclusion of ALL elements in a set.

Interxection, denoted by ∩, is the inclusion of elements that are the SAME.

Easy way to Remember:

Union is ALL Elements, pretty easy ?

Intersections is finding the same ones.

Let’s try an example!

#### Sample Problem

Set A = {A,E,I,O,U}

Set B = {A,B,C,D,E}

Find A ∪ B and A ∩ B

#### Solution

A ∪ B = {A,B,C,D,E,I,O,U} * Remember to write each element once in order. If they

were numbers, we would put them in numerical order

Step 1: Find all elements that are common in both sets. In this case the common letter of Set A and Set B are elements A and E. Therefore the intersection is…

A ∩ B = {A, E}

# About The Author

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My name is Jeffrey Narcisse and I am a graduate of Sports and Medical Sciences Academy. I have been mentoring middle school students throughout my high school career and have also tutored many high school students in mathematics. The highest math class I have been in is AP Calculus AB and passed wit... |

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