淮滨县
淮滨县新里中学杨德春
是 x的 反比例函数，比例系数 k= 21)1()21( xy 2)5(1)4(1)3(21)2(4)1(xyxyxyxyxy2)5(1)4(1)3(21)2(4)1(xyxyxyxyxy2)5(1)4( 1)3(21)2(4)1(xyxyxy xyxy 2)5(1)4( 1)3(21)2(4)1(xyxyxy xyxy
是 x的 反比例函数，比例系数 k= 21)1()21( xy 2)5(1)4(1)3(21)2(4)1(xyxyxyxyxy2)5(1)4(1)3(21)2(4)1(xyxyxyxyxy2)5(1)4( 1)3(21)2(4)1(xyxyxy xyxy 2)5(1)4( 1)3(21)2(4)1(xyxyxy xyxy