공집합, (1), (2), (3), (4), (1,2), (1,3), (1,4), (2,3),(2,4),(3,4),(1,2,3), (1,2,4),(1,3,4),(2,3,4),(1,2,3,4)으로 총 16개 입니다. ^^
[무물보AI] 답변 로딩중...