1.

Let P , Q and R are three co-normal points on the parabola y^2=4ax. Then the correct statement(s) is /at

Answer»

<P>algebraic sum of the slopes of the normals at P,Q and R VANISHES
algebraic sum of the ordinates of the points P,Q and R vanishes
centeroid of the traingle PQR lies on the AXIS of the parabola
Circle cicrcumscribing the traingle PQR passes through the vertex of the parabola.

Answer :A::B::C::D


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