## Precalculus (6th Edition) Blitzer

(b) Consider the function: f\left( x \right)=\left\{ \begin{align} & \text{3 if }x\le -1 \\ & -\text{3 if }x>-1 \end{align} \right. The graph of the function f consists of two parallel straight lines also parallel to the x axis. As it can be determined, the range of the function is $\left\{ -3,3 \right\}$. Thus, the range of the function is $\left\{ -3,3 \right\}$.
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