[问答题]已知点P(2,-3,3),平面π:x+2y+4z-2=0,则点P到π的距离为------------,过点P且和π平行并与z轴相交的直线方程为----
[问答题]已知点P(2,-3,3),平面π:x+2y+4z-2=0,则点P到π的距离为----------,过点P且和π平行并与z轴相交的直线方程为------
[单选题]过点(0,2,4)且与两平面x+2z=1和y-3z=2平行的直线方程是().A . B . C . D .
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,
[单选题]已知曲面z=4-x2-y2上点P处的切平面平行于平面2x+2y+z-1=0,则点P的坐标是( )。A.(1,-1,2)B.(-1,1,2)C.(1,