(1,2.3,4)的子集、真子集、非空子集、非空真子集分别是哪几个

问题描述:

(1,2.3,4)的子集、真子集、非空子集、非空真子集分别是哪几个

{1,2,3,4}子集:{},{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}(16个)真子集:{},{1},{2},{3},{4},{1,2},{1,3},{1,4},{2,3},{2,4},{3,4},{1,2,3},{1,2,4},{1...