設A={X|X是小於9的正整數},B={1,2,3},C={3.4.5.6.},求AUB,A∩C,A∩(BUC),AU(B∩C)

設A={X|X是小於9的正整數},B={1,2,3},C={3.4.5.6.},求AUB,A∩C,A∩(BUC),AU(B∩C)

AUB={1,2,3,4,5,6,7,8},
A∩C={3.4.5.6.}
A∩(BUC)={1,2,3,4,5,6,},
AU(B∩C)={1,2,3,4,5,6,7,8},