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The equation of a tangent to the hyperbola 4x 2 – 5y 2 = 20 parallel to the line x – y = 2 is -

1. x – y + 9 = 0
2. x – y – 3 = 0
3. x – y + 1 = 0
4. x – y + 7 = 0

Correct answer: x – y + 1 = 0

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