Appendix A - Appendix A Exercises - Page 1157: 2

$$\left\{ {x:x < 2} \right\}$$

$$\eqalign{ & {\text{We can write the interval}}\,\,\left( { - \infty ,a} \right){\text{ in set notation as}} \cr & \left( { - \infty ,b} \right) = \left\{ {x:x < b} \right\} \cr & {\text{Then,}} \cr & {\text{Given the interval }}\left( { - \infty ,2} \right) \cr & \left( { - \infty ,2} \right) = \left\{ {x:x < 2} \right\} \cr & {\text{Graph}} \cr} $$