Plane and solid analytic geometry; an elementary textbook (1904)
Ashton, Charles Hamilton, 1866-1936 · New York, C. Scribner's Sons · leaf 143
. The equation of a secantthrough the given point Pv (xv y±), and an adjacent point P2, (xx + h, yx + &), … on the curve is V ~ V\ _ *x — x1 h It is necessarytermine in each to de-case a Fig. 69. value of - which willh not be indeterminatewhen h and k approach zero. We shall give the work in detail for the ellipse, b2x2 -\- a2y2 = a2b2. Since the points Px and P2 lie on the ellipse, their coordinates…
Geometry, Analytic
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