2.过点A(1.1)且与圆相切的直线方程为 ( ) A.2x-y=1 B.3x-2y=1 C.x+y-2=0 D.x-y=0 查看更多

 

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过点P(-2-1)且与圆相切的直线方程一定是   

[  ]

A4x-3y+5=0       By=-1

C4x-3y+5=0y=-1   D4x+3y-5=0y=-1

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过点(-1,1)且与圆x2+y2-4x+2y-4=0相切的直线的方程为(  )

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过点(-1,1)且与圆x2+y2-4x+2y-4=0相切的直线的方程为(  )
A.5x-12y+17=0
B.5x-12y+17=0或5x+12y+17=0
C.x=-1或5x+12y+17=0
D.x=-1或5x-12y+17=0

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过点(-1,1)且与圆x2+y2-4x+2y-4=0相切的直线的方程为( )
A.5x-12y+17=0
B.5x-12y+17=0或5x+12y+17=0
C.x=-1或5x+12y+17=0
D.x=-1或5x-12y+17=0

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过点(-1,1)且与圆x2+y2-4x+2y-4=0相切的直线的方程为


  1. A.
    5x-12y+17=0
  2. B.
    5x-12y+17=0或5x+12y+17=0
  3. C.
    x=-1或5x+12y+17=0
  4. D.
    x=-1或5x-12y+17=0

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