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Unformatted text preview: Here is the number line for this problem. The solution for this inequality is then, -¥ < x £ -2 0< x£4 ( -¥, -2] © 2007 Paul Dawkins and
and ( 0, 4] 139 http://tutorial.math.lamar.edu/terms.aspx College Algebra Absolute Value Equations
In the final two sections of this chapter we want to discuss solving equations and inequalities that
contain absolute values. We will look at equations with absolute value in them in this section and
we’ll look at inequalities in the next section.
Before solving however we should first have a brief discussion of just what absolute value is.
The notation for the absolute value of p is p . Note as well that the absolute value bars are NOT
parentheses and in many cases don’t behave as parentheses so be careful with them.
There are two ways to define absolute value. There is a geometric definition and a mathematical
definition. We will look at both.
In this definition we are going to think of p as the distance of p from the origin on a number
line. Also we will always use a positi...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12