Using the definition of the absolute value function, it is found that:
It measures the distance of a point x to the origin, and is defined by:
[tex]|x| = -x, x < 0[/tex]
[tex]|x| = x, x \geq 0[/tex]
As for the expression used in this problem:
[tex]\frac{|x|}{x} = -\frac{x}{x} = -1, x < 0[/tex]
[tex]\frac{|x|}{x} = \frac{x}{x} = 1, x > 0[/tex]
Hence:
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