P and q are points on the parabola x24ay tangents tp and tq


P and Q are points on the parabola x^2=4ay. Tangents TP and TQ are drawn from an external point T and hese tangents cut the X-axis at A and B. Show that the line joining the focus to the midpoint of AB is perpendicular to the chord of contact PQ.

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Mathematics: P and q are points on the parabola x24ay tangents tp and tq
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