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Homework problem! (tangents equation)

  1. Jun 18, 2009 #1
    Could you help me solve this one :


    Write the the equations of the tangents of the parabole x^2=2y-4 that go through the origin of coordinates. Whats the surface of the figure formed by the parabole and the tangents.

    I am not sure i have translated thi one in an understanding way :(.
     
  2. jcsd
  3. Jun 18, 2009 #2

    tiny-tim

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    Hi Penultimate! :smile:

    (try using the X2 tag just above the Reply box :wink:)
    Hint: the line from the origin to a general point P must have the same slope (gradient) as the tangent at P. :wink:
    mmm … I don't understand that :confused:

    do you mean what's the area?
     
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