My mother is a teacher.She goes to school 7:00 the morning.
A:at;on
B:at;at
C:at;in
发源于南亚的宗教是( )
集合A={x|1≤x<7},B={x|2<x<10},C={x|x<a},全集为实数集R.
(1)求A∪B,
(2)求(∁RA)∩B
(3)如果A∩C≠∅,求a的取值范围.