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find equation of a parabola with the given conditions
Vertex V(-2,3)
directrix y=5
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you must know that the distance between directrix and vertex equal vertex to focus.
then we can locate , that the focus is F=( -2 ,1 )
Also , any point on this parabola ,say P . The distant between P to F is equal to P to directrix
so
Last edited by Stanley_Marsh (2007-05-05 10:36:45)
Numbers are the essence of the Universe
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