SweetPeony9053 SweetPeony9053

29-01-2024
Mathematics

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If the equation of the directrix of a rectangular hyperbola is xy = 1 and its center is (0, 5), and the equation of the hyperbola is ax² + by² + 4xy + cx + dy + e = 0, then the value of c + d - 2e is ________.

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