设U=R,集合A={x x<-3或x>3},B=(-无穷,1)并(4,正无穷),则.(CuA)并B= 什么

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设U=R,集合A={xx<-3或x>3},B=(-无穷,1)并(4,正无穷),则.(CuA)并B=什么设U=R,集合A={xx<-3或x>3},B=(-无穷,1)并(4,正无穷

设U=R,集合A={x x<-3或x>3},B=(-无穷,1)并(4,正无穷),则.(CuA)并B= 什么
设U=R,集合A={x x<-3或x>3},B=(-无穷,1)并(4,正无穷),则.(CuA)并B= 什么

设U=R,集合A={x x<-3或x>3},B=(-无穷,1)并(4,正无穷),则.(CuA)并B= 什么
解CuA={x/-3≤x≤3}
故.(CuA)∪B
=(-无穷,3]∪(4,正无穷),