| Absolute Value |
|
| Absolute value makes a negative
number positive. Positive numbers and 0 are
left unchanged. The absolute value of x is written
|x|. We write |–6| = 6 and |8| = 8.
Formally, the absolute value of a number is
the distance between the number and the origin.
This is a much more powerful definition than
the "makes a negative number positive"
idea. It connects the notion of absolute value
to the absolute value of a complex number and
the magnitude of a vector.
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