设空集U={1,2,3,4,5,6,7,8,9},Cu(AUB)={1,3},An(CuB)={2.4},求集合B

Cu(AUB)={1,3},AUB={2,4,5,6,7,8,9,} An(CuB)={2。4},B=AUB-{2,4}={5,6,7,8,9}