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[Post New]12 Dec 2007 12:01:18 IST
    Subject: Re:parabola doubt
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nitin62225 (749)

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Olaaa!! Perrrfect answer. 133  [175 rates]
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take y=c as any line || to the axis


so u get point of intersection is,

             (c^2/(4a),c) and (-c^2/(4b),c)

so the mid pnt= ((c^2/8)(1/a-1/b),c)

now c is a variable so eliminate it,

so c=[8/(1/a-1/b)X]^(1/2)
and also c=Y

so u get Y^2=8/(1/a-1/b)X

which is indeed a parabola.

hence proved!



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