【单选题】设集合U={x|x是小于9的正整数},集合A={1,2,3},集合B={3,4,5,6},则? U A∩? U B=( )
【单选题】设集合P={1,2,3,4},Q={x|3≤x<7,x∈N},则P∪Q=( )
【单选题】设集合U={x∈N|0<x≤8},S={1,2,4,5},T={3,5,7},则S∩(C U T)= [ ]
【简答题】已知函数f(x)=6x-4(x=1,2,3,4,5,6)的值域为集合A,函数g(x)=2x-1(x=1,2,3,4,5,6)的值域为集合B,任意a∈A∪B,则a∈A∩B的概率是______.
【单选题】若集合U={1,2,3,4,5,6,7},A={1,3,5,7,},B={1,3,5,6,7},则集合? U (A∩B)是( )