Focal chords A focal chord of a conic section is a line through a focus joining two points of the curve. The latus rectum is the focal chord perpendicular to the major axis of the conic. Prove the following properties. 91. Let L be the latus rectum of the parabola y 2 = 4 px , for p > 0. Let F be the focus of the parabola, P be any point on the parabola to the left of L , and D be the (shortest) distance between P and L. Show that for all P , D + | FP | is a constant. Find the constant.
Focal chords A focal chord of a conic section is a line through a focus joining two points of the curve. The latus rectum is the focal chord perpendicular to the major axis of the conic. Prove the following properties. 91. Let L be the latus rectum of the parabola y 2 = 4 px , for p > 0. Let F be the focus of the parabola, P be any point on the parabola to the left of L , and D be the (shortest) distance between P and L. Show that for all P , D + | FP | is a constant. Find the constant.
Solution Summary: The author explains that the value of the constant is 2p for the focal chord of a conic section.
Focal chordsA focal chord of a conic section is a line through a focus joining two points of the curve. The latus rectum is the focal chord perpendicular to the major axis of the conic. Prove the following properties.
91. Let L be the latus rectum of the parabola y2 = 4px, for p > 0. Let F be the focus of the parabola, P be any point on the parabola to the left of L, and D be the (shortest) distance between P and L. Show that for all P, D + |FP| is a constant. Find the constant.
Curve that is obtained by the intersection of the surface of a cone with a plane. The three types of conic sections are parabolas, ellipses, and hyperbolas. The main features of conic sections are focus, eccentricity, and directrix. The other parameters are principal axis, linear eccentricity, latus rectum, focal parameter, and major and minor axis.
Elementary Statistics: Picturing the World (7th Edition)
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Finding The Focus and Directrix of a Parabola - Conic Sections; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=KYgmOTLbuqE;License: Standard YouTube License, CC-BY