## College Algebra 7th Edition

(a) $\mathcal{x}$ $\gt$ 2 (b) -3 $\leq$ $\mathcal{x}$ $\leq$ -1 (c) 0 $\leq$ $\mathcal{x}$ $\lt$ 9
In (a) $\mathcal{x}$ $\gt$ 2 because the other end of the limit is $\infty$ In (b) and (c) numbers are given and (parentheses) are closed intervals and [brackets] are open inverals.