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29-12-2023
Mathematics

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If x = 9 is the chord of contact of the hyperbola x² − y²=9, then the equation of the corresponding pair of tangents is
A. 9x²−8y²+18x−9=0
B. 9x²−8y²−18x+9=0
C. 9x²−8y²−18x−9=0
D. 9x²−8y²+18x+9=0

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