• 2022-06-11
    设有如图2.18所示的关系S和R,计算:(1)[tex=21.714x1.286]rVRKWlTPgl5/kgxsohalT6vDx51+2z51DjskQd4GvQ+gD//lZwi8tetOUHw7yAekKVgmqnuAcJNqny4YDejDq2knax99CeKIgPdFbDOImNAXO9oM8UT7Scy8hgvtRWxFEkzo4JSUyAp2ZOpzhtYGNg==[/tex](2)[tex=21.143x1.286]7XJB0kK1LbktHJ2sWZRAb5Szf0lUz1jTmxYWt4W/Z6wM/+/9V8lXr/TnygaHsrvYxyLH2m17r0ayGtZu8pFq+ZJ139w2VvrM3ITQZDYexY4=[/tex][img=343x194]17e2dc2a6dd4878.png[/img]