If (a,b) is the mid-point of chord passing through the vertex of the parabola y2=4x,then
A
a2=3b
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B
2a=b
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C
a2=2b
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D
2a=b2
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Solution
The correct option is D2a=b2 Let the other point of chord be (t2,2t) and other point is (0,0) then mid point (a,b)=(t22,t) Eliminating t, we get 2a=b2 Ans: D