9(CuA)∩B={4,6,8},中的9是打多的吧
A∩B={3},(CuA)∩B={4,6,8},得B中有｛3,4,6,8｝
A∩B={3},A∩(CuB)={1,5},得A中有｛1,3,5｝
(CuA)U(CuB)={x|x<10,x∈N+,X=/3},得(CuA)U(CuB)=｛1,2,4,5,6,7,8,9｝
所以A=｛1,3,5｝,B=｛3,4,6,8｝
(AUB)=｛1,3,4,5,6,8｝
Cu(AUB)={2,7,9}