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CGP EDU Academic Team
Published on: August 14, 2026
The locus of point of trisection of the double ordinates of the parabola y 2 = 4ax is
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A
P=(at 2 , 2at), Q = (at 2 , -2at) are the extremities of double ordinate, let (x, y) divides PQ in the ratio 2:1 then x = at 2 , y = 
By eliminating t, we get 9y 2 = 4ax
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