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  1. D

    please help - tangent to curve parabola

    Find the equation of the tangent to the curve x^2 = -2y at the point (4,8) This tangent meets the directrix at point M. Find the co-ordinates of point M. I have found that the equation of the tagent is 4x + y - 8 = 0 Can someone help me with the second part of the question? Much appreciated (:
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