Section 1.1: Sets and Intervals

  1. Express the interval in terms of inequalities. Then graph the interval.   solution

    2. (a) \( (-1, 3) \)   (b) \( (-2, 5] \)   (c) \( (-\infty, 4) \)   (d) \( [2, \infty) \)

  2. Express the inequality in interval notation. Graph the corresponding interval.  solution

    3. (a) \( x\leq 4 \)   (b) \( 3 \leq x < 7\)