Question

设A={x属于Z|x的绝对值小于等于6},B等于{1,2,3}C={3,4,5,6}

Answer 1

A={x属于Z|x的绝对值小于等于6}＝﹛-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6﹜

（CaB）＝﹛-6,-5,-4,-3,-2,-1,0,4,5,6﹜

CaB）∩C={4,5,6}

（B并C﹚＝﹛1,2,3,4,5,6﹜

A∩Ca（B并C）＝﹛-6,-5,-4,-3,-2,-1,0﹜