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Math Help - Ellipse question

  1. #1
    Junior Member
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    Feb 2011
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    Ellipse question

    Ellipse question-dsc00592.jpg

    I need help with example 5.4L. I can understand all the working steps but i don't understand how they get m1 and m2, which is the point of intersection of the two perpendicular tangent... Can anyone enlighten me?
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  2. #2
    Senior Member
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    Feb 2010
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    we have a quadratic equation in m whose roots are m1 and m2 solving them we will get point of intersection
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