+0

0
45
1

Let

$f(x) = \left\{ \begin{array}{cl} -x - 3 & \text{if } x \le 1, \\ \frac{x}{2} + 1 & \text{if } x > 1. \end{array} \right.$

Find the sum of all values of x such that $f(x) = 0$.

May 30, 2021