集合A={x丨-5≤x≤3},B={x丨x4},求A∩B,(CRA)∪(CRB)
问题描述:
集合A={x丨-5≤x≤3},B={x丨x4},求A∩B,(CRA)∪(CRB)
答
A∩B={X|-5≤X≤3}∩{X|X4}={x|-5≤x(CRA)∪(CRB)=CR(A∩B)=CR{x|-5≤x
答
A∩B为[-5,-2)
(CRA)∪(CRB)为(负无穷,-5)∪[-2,正无穷)