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    Smile


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    :
    * :
    1) (Circle) .
    2) ( Parabola).
    3) ( Ellipse).
    4) (Hyperbola ).

  3. Top | #3

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    : ( M(x , y (F(p , 0 (p> 0) " D " . MF = MQ " O " ( v ) ( x ) . e = 1 e

    y2 = 4px , p > 0

    y2 = 4px
    :
    : y2 = 12 x
    : y2 = 2px
    4p = 12
    3 = p
    ∴( F ( 3 , 0
    x = p x = 3

  4. Top | #4

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    x2 = 4py , p > 0
    x2 = -4py
    : ( V(0,0 (h) (x) (k) (y) :
    ( V ( h , k
    ( x ) ( y ) .
    :
    (y k )2 = 4p (x h ) .. (3)
    (x h ) 2 = 4p (y k ) ..(4)
    ( 3 ) ( 4 ) ( V ( h , k
    ( )
    :
    ( ) :
    (V ( h , k
    (F ( p + h , k
    x = p + h :
    y = k
    ( ) :
    (V ( h , k
    (F ( p + h , k
    x = p + h :
    y = k

    : .
    ( y + 1 )2 = 4 ( x 4 )
    ( y k )2 = 4 p ( x h )
    :
    (V ( h , k ) = ( 4 , 1 , 4p = 4 p = 1
    (F( p + h , k ) = ( 1 + 4 , 1 ) = ( 5 , 1
    x = p + h :
    x = 1 + 4 = 3
    y = k y = 1

  5. Top | #5

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    ; 09-19-2012 07:48 PM

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    ; 09-19-2012 08:20 PM

  7. Top | #7

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    ,






    ; 09-19-2012 07:56 PM

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    ȿ

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    Lightbulb





    ; 09-19-2012 08:12 PM

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