Question

設(shè)集合U＝{小于7的正整數(shù)}，A＝{1,2,5}，B＝，則A∩(∁_UB)＝(　　)

A．{1}                  B．{2}        C．{1,2}                  D．{1,2,5}

Answer 1

解析：U＝{1,2,3,4,5,6}，B＝{3,4,5}，則A∩∁_UB＝{1,2}．

答案：C