Question: The Normal at a point P of ellipsoid x2 y2 = 1 meets the coordinate's f2 d2 planes in D1, D2, D3 , prove

The Normal at a point P of ellipsoid x2 y2 = 1 

The Normal at a point P of ellipsoid x2 y2 = 1 meets the coordinate's f2 d2 planes in D1, D2, D3 , prove that the ratios PD1, PD2, PD3 are constants.

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