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Let

\(f(x) = \left\{ \begin{array}{cl} -x + 3 & \text{if } x \le 0, \\ 2x - 5 & \text{if } x > 0. \end{array} \right.\)

How many solutions does the equation  have?

 May 16, 2021
 #1
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The equation f(f(x)) = 4 has 5 solutions.

 May 16, 2021

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