Osgood, William F. (William Fogg), 1864-1943, Graustein, William Caspar, 1888-1941, joint author · New York, The Macmillan company · leaf 120
ipse 25 x2 + 16y* = 400. Ans. 6|. 10. Prove that the minor axis of an ellipse is a mean pro-portional between the major axis and the latus rectum. 7. A New Locus Problem. Given a line D and a point Fdistant m from D. To find the locus of a point P such thatthe ratio of its distance FP from F toits… … 114 ANALYTIC GEOMETRY is a parabola with D as directrix and F as focus; Ch.VI, § 1. To treat the general case, let D be taken as the axis of yand let the positive axis of x pass through F. Then x. FP = -V{x- m)2 + y\ MP = ± the lower sign holding only when x is negative, and (1) be-comes (2) -V(x -…
Geometry, Analytic
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