A={1,2,3,4}
它的非空真子集的个数是2^4-2=14个
分别是:
{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}
如果不懂,请Hi我,祝学习愉快!
A={1,2,3,4}
它的非空真子集的个数是2^4-2=14个
分别是:
{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}
如果不懂,请Hi我,祝学习愉快!