Question

求此1.2题解法

Answer 1

1.①B∩C=3 A{x∈Z| |x|＜6} ∴A∪（B∩C）=A

即A∪（B∩C）={-5,-4,-3,-2,-1,0,1,2,3,4,5}

②B∪C={1,2,3,4,5} Ca(B∪C)={-5,-4,-3,-2,-1,0}

∴A∩Ca(B∪C)={-5,-4,-3,-2,-1,0}

2.若X^2-x=2 则x=2或-1 当x=2时不满足元素的互异性 {1,2,2}

∴x=-1 此时集合为{1,2,-1}