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Statement I The lines from the vertex t...

Statement I The lines from the vertex to the two extremities of a focal chord of the parabola `y^2=4ax` are perpendicular to each other.
Statement II If extremities of focal chord of a parabola are `(at_1^2,2at_1)` and `(at_2^2,2at_2)` , then `t_1t_2=-1`.

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