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[" If "x=3" is the chord of contact of the circle "x^(2)+y^(2)=81," then the equation of the corresponding pair of "],[" tangents,is "],[[" (A) "x^(2)-8y^(2)+54x+729=0," (B) "x^(2)-8y^(2)-54x+729=0],[" (C) "x^(2)-8y^(2)-54x-729=0," (D) "x^(2)-8y^(2)=729]]

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