gaokao 2011 Q1

gaokao · China · shanghai-arts Inequalities Set Operations Using Inequality-Defined Sets

1. If the universal set $U = \mathbb{R}$, set $A = \{ x \mid x \geq 1 \}$, then $C_U A =$ $\_\_\_\_$

1. If the universal set $U = \mathbb{R}$, set $A = \{ x \mid x \geq 1 \}$, then $C_U A =$ $\_\_\_\_$\\