## Precalculus: Mathematics for Calculus, 7th Edition

a) $[0,2)$ b) $(-2,0]$
a) To express in interval notation, use the two points on the number line as the starting points for your interval:$$0,2$$Then add a parenthesis for the open point at two, and a square bracket for the closed point at 0:$$[0,2)$$b) To express in interval notation, use the two points on the number line as the starting points for your interval:$$-2,0$$Then add a parenthesis for the open point at negative two, and a square bracket for the closed point at 0:$$(-2,0]$$