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KVPY SX SB Exam 2015 Question Paper

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Question : 83

Total: 120

A mirror in the first quadrant is in the shape of a hyperbola whose equation is xy=1. A light source in the second quadrant emits a beam of light that hits the mirror at the point (2,

). If the reflected ray is parallel to the y-axis, the slope of the incident beam is -

13
8
7
4
15
8
2

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