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A Problem in Confocals
Published online by Cambridge University Press: 31 October 2008
Extract
In the standard text books on Analytical Geometry the following problem occurs in the exercises on confocals:
The product of the four normals from a point P to the ellipseX2/a2 + Y2/b2 = 1 is equal to where λ1 and λ2 are the parameters of the confocals through P.
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- Copyright © Edinburgh Mathematical Society 1932