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Q.

Let the line y=mx and the ellipse 2x2+y2=1 intersect at a point P in the first quadrant.  the area of the traingle formed by the normal to this ellipse at P with axes is  Normal is passing through the point -132,0

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a

223

b

23

c

23

d

118

answer is D.

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Detailed Solution

Let P be x1,y1 Equation of normal at P is x2x1-yy1=-12 It passes through -132,0⇒-162x1=-12⇒x1=132 So y1=223 (as P lies in 1st  quadrant  The area of the triangle formed by this normal with axes is 1223132Therefore the area of the triangle is 118square units
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