Compound Inequalities - muncysd.org
Compound Inequalities
Section 3-6
Goals
Goal ? To solve and graph
inequalities containing the word and. ? To solve and graph inequalities containing the word or.
Vocabulary
? Compound Inequality ? Interval Notation
Definition
? The inequalities you have seen so far are simple inequalities. When two simple inequalities are combined into one statement by the words AND or OR, the result is called a compound inequality.
? Compound Inequality ? the result of combining two inequalities. The words and and or are used to describe how the two parts are related.
Venn Diagram and Compound Inequalities
In this diagram, set A represents some integer solutions of x < 10, and set B represents some integer solutions of x > 0. The overlapping region represents numbers that belong in set A and set B. Those numbers are solutions of both x < 10 and x > 0 (can be written 0 < x < 10).
Number Line and Compound Inequalities
You can graph the solutions of a compound inequality involving AND by using the idea of an overlapping region. The overlapping region is called the intersection and shows the numbers that are solutions of both inequalities.
Venn Diagram and Compound Inequalities
In this diagram, set A represents some integer solutions of x < 0, and set B represents some integer solutions of x > 10. The combined shaded regions represent numbers that are solutions of either x < 0 or x >10 (or both).
Number Line and Compound Inequalities
You can graph the solutions of a compound inequality involving OR by using the idea of combining regions. The combined regions are called the union and show the numbers that are solutions of either inequality.
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