• 2022-06-16
    设有如图2.16所示的关系R,W和D,计算:(1)[tex=5.214x1.357]XUb2uC9BSxYVlKmwvzNHTGOIc3/MgF5L931wK4U9Pt0=[/tex](2)[tex=10.357x1.357]XNP+O/OgJeEtbTxWJIRBVg6lskpsMJCX/lTDOusl3oL5cUYrSXHc8Uq+8rrCrWcy[/tex](3)[tex=5.214x1.0]Hv7mQrmD00tN7RXEn3HVzDMVdYHvnBbVpejVq+9yAwQ=[/tex](4)[tex=12.5x1.5]nNjfYmySekVxziqkCT16/DEViTS+s/iqCc4QDIdYqkGeySqGf54ZTxwAorkdnAAnbSmnCGiRVpmACpoFSscVW3feDajCvvHuRt0E+4kFvYU=[/tex](5)[tex=4.857x1.143]Qw4nxo2VqcMrdIN2x+hDew==[/tex][img=480x224]17e2dbff5a1fc64.png[/img]
  • 举一反三