hey isnt that the condition fr line to be tangent of ellipse?? i think the eqn to normal given as a^2 x/ x1 - b^2 y/ y1 = a^2- b^2 wud help cuz by ur method 'm not gettin a a^2- b^2 term as needed by the options.. here x1 n y1 lie on the ellipse..but how do u eliminate them both is the ques..
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