Elements of analytical geometry and the differential and integral calculus (1856)
Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Cincinnati : J. Ernst · leaf 55
Ja^A^+B^ Ja^A^+B- AB , aAB Ja^A-+B^ Ja^A^+B^ These equations show that the co-ordinates of the point Dyare the same as those of the point D\ except opposite in signs.Hence UB is bisected at the center.4 … 46 ANALYTICAL GEOMETRY. PROPOSITION III. The squares of the ordinates are to one another as the rectanglesof their corresjmnding abscissas. Let y be any ordinate, and x its corres-ponding abscissa. Then, by the firstproposition, we shall have Let y be any other ordinate, and x itscorresponding…
Geometry, Analytic · Calculus
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