All we need to note is that in the formula above p

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Unformatted text preview: ve value for distance. Consider the following number line. From this we can get the following values of absolute value. 2 =2 -3 = 3 99 = 22 All that we need to do is identify the point on the number line and determine its distance from the origin. Note as well that we also have 0 = 0 . Mathematical Definition We can also give a strict mathematical/formula definition for absolute value. It is, if p ³ 0 ìp p =í î- p if p < 0 This tell us to look at the sign of p and if it’s positive we just drop the absolute value bar. If p is negative we drop the absolute value bars and then put in a negative in front of it. So, let’s see a couple of quick examples. © 2007 Paul Dawkins 140 College Algebra 4 =4 because 4 ³ 0 -8 = - ( -8 ) = 8 because - 8 < 0 0 =0 because 0 ³ 0 Note that these give exactly the same value as if we’d used the geometric interpretation. One way to think of absolute value is that it takes a number and makes it positive....
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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.

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