如果 {0.1}UA = {0,1,2,3,4},問(wèn)滿足條件的集合A有多少個(gè)?

熱心網(wǎng)友

4個(gè)。有{2,3,4},{1,2,3,4},{0,2,3,4}和{0,1,2,3,4}