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07-02-2024
Mathematics

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If in an ellipse, a focus is (6,7), the corresponding directrix is x+y+2=0 and the eccentricity = 1/2, then the equation of the ellipse is:
A. 7x ²+2xy+7y²−44x−108y+684=0
B. 9x²−2xy+9y²−44x−108y+684
C. 7x²−2xy+7y²−100x−116y+676=0
D. none of these

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