问题描述: 设A={1,2,3},给定A上二元关系R={,,},求r(R),s(R)和t(R). 1个回答 分类:数学 2014-12-15 问题解答: 我来补答 (R)={,,,,},s(R)={,,,,},t(R)={,,,,} 展开全文阅读