Mathematics, 12.09.2019 05:20, heyysn3858

For some constants a and b let \[f(x) = \left\{ \begin{array}{cl} 9 - 2x & \text{if } x \le 3, \\ ax + b & \text{if } x > 3. \end{array} \right.\]the function f has the property that f(f(x)) = x for all x. what is a + b?

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For some constants a and b let \[f(x) = \left\{ \begin{array}{cl} 9 - 2x & \text{if } x \le 3,...