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Grade 11IIT JEE Entrance Exam

If the normals at 4 points x1,y1 x2,y2 x3,y3 and x4,y4 on same ellipse are concurrent. Find the value of (x1+x2+x3+x4)(1/x1+1/x2+1/x3+1/x4).

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6 Years agoGrade 11
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