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A tangent is drawn at any point P(t) on the parabola `y^(2)=8x` and on it is takes a point `Q(alpha,beta)` from which a pair of tangent QA and OB are drawn to the circle `x^(2)+y^(2)=8`. Using this information, answer the following questions :
The locus of the point of concurrecy of the chord of contact AB of the circle `x^(2)+y^(2)=8` is

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