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Range of $f(x)=\large\frac{|x|}{x}$ is ?

$\begin{array}{1 1} \{1,-1\} \\ \{1\} \\ (1,-1) \\ [-1,1] \end{array}$

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  • $|x| =x$ if $x\geq 0$ and $|x|=-x$ if $x<0$.
$\large\frac{|x|}{x}$ $=\large\frac{x}{x}=1$ or $=\large\frac{-x}{x}=-1$
Range = $\{1,-1\}$
answered May 17, 2013 by rvidyagovindarajan_1
 
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