D(0,-2)关于直线y=x的对称点为D1(-2,0),
沿直线y=x+2向下平移3√2个单位至D2(-5,-3),
设直线D2E:y=kx+b,则
-4=-k+b,
-3=-5k+b,
解得k=-1/4,b=-17/4.
∴D2E:y=-x/4-17/4,交L于M(-17/5,-17/5),
沿直线L向上平移3√2个单位至N(-2/5,-2/5),为所求.
D(0,-2)关于直线y=x的对称点为D1(-2,0),
沿直线y=x+2向下平移3√2个单位至D2(-5,-3),
设直线D2E:y=kx+b,则
-4=-k+b,
-3=-5k+b,
解得k=-1/4,b=-17/4.
∴D2E:y=-x/4-17/4,交L于M(-17/5,-17/5),
沿直线L向上平移3√2个单位至N(-2/5,-2/5),为所求.