Difference between revisions of "Absolute value"
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Revision as of 16:08, 7 March 2015
The absolute value is sometimes called "abs"
Definition
The absolute value is a function |⋅|:R→R given by:
|x|={xx≥0−xotherwise
It simply returns the positive value of a number.
Note
More strictly the function should be given as: |⋅|:R→R≥0
Examples
- |−2|=2
- |2|=2