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JEE Main 2013 Mathematics question

MathematicsStraight LinesJEE Main 2013

A light ray emerging from the point source placed at P(1, 3) is reflected at a point Q in the axis of x. If the reflected ray passes through the point R (6, 7), then the abscissa of Q is:

Answer: (4)

Solution

The reflected ray appears to come from the image P′(1, −3). Line P′R: slope

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Question ID VK-103962