Question

已知集合A=｛xl3<=x<7},B={xl2<x<10},求CR(AUB),CR(A交B),(CRA)交B,AU(CRB)

Answer 1

CR(AUB)=｛xlx<=2或x>=10}, CR(A交B)=｛xlx<3orx>7}, (CRA)交B=｛xl2<x<3or<7x<10}, AU(CRB)=｛xlx<=2or3<=x<=7orx>=10},

Answer 2

CR(AUB)={X|X<=2或X>=10} CR(AnB)={X|X<3或X>=7} (CRA)nB={X|2<X<3或7<=X<10} AU(CRB)={X|X<=2或3<=x<7或X>=10}