Let \(f(x) = \left\{ \begin{array}{cl} 2x + 1 & \text{if } x \le 3, \\ 8 - 4x & \text{if } x > 3. \end{array} \right.\) Find the sum of all values of x such that f(x) = 0
2x + 1 = 0 8 - 4x = 0
2x = -1 8 = 4x
x = -1/2 OK because x ≤ 3 x = 8/4 = 2 not OK because x must be > 3
Sum = -1/2
+17 
