设全集为U=R,集合A={X‖-2<X小于等于4}集合B={X‖-4<X小于等于1}[1]求A∩B.[2]求CU(A∩B)
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设全集为U=R,集合A={X‖-2<X小于等于4}集合B={X‖-4<X小于等于1}[1]求A∩B.[2]求CU(A∩B)
设全集为U=R,集合A={X‖-2<X小于等于4}集合B={X‖-4<X小于等于1}
[1]求A∩B.[2]求CU(A∩B)
设全集为U=R,集合A={X‖-2<X小于等于4}集合B={X‖-4<X小于等于1}[1]求A∩B.[2]求CU(A∩B)
(1) -2
-2小于X小于-1 X小于等于-2大于等于-1
刚才题目看错了,第一个是-2小于X小于等于1 第二个是小于等于-2大于等于1
可以画数轴。(具体见图) A∩B={x丨-2<x≤1} Cu(A∩B)={x丨x≤-2或x>1}
(1)x大于-2小于等于1
(2)x小于等于-2或大于1