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J & K CET Engineering J and K - CET Engineering Solved Paper-2006

  • question_answer
    The radical axis of the coaxial system of circles with limiting points \[(1,2)\] and \[(-2,1)\] is

    A)  \[x+3y=0\]     

    B)  \[3x+y=0\]

    C)  \[2x+3y=0\]    

    D)  \[3x+2y=0\]

    Correct Answer: B

    Solution :

    Limiting points of a coaxial system of circle are the points of the system of circle ie, circles of radii are zero. Given limiting points are \[(1,\,\,2),\,\,(-2,\,1)\]. \[\therefore \] Required equation of radical axis of the coaxial system of circle is \[3x+y=0.\]


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