Difference between revisions of "LinearEccentricity Command"

Revision as of 20:21, 21 December 2015

LinearEccentricity[ <Conic> ]: Calculates the linear eccentricity of the conic section,

For ellipse or hyperbola the distance between the conic center and one of its foci.

Example: LinearEccentricity[4x^2 - y^2 + 16x + 20 = 0] returns 2.24

For circle, return 0

For parabola, the distance between the focus and the vertex

@@ Line 1: / Line 1: @@
 <noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|conic}}
-; LinearEccentricity[ <Conic> ]: Calculates the linear eccentricity of the conic section, i.e. the distance between the conic center and its focus (or one of its two foci).
+; LinearEccentricity[ <Conic> ]: Calculates the linear eccentricity of the conic section,
+For ellipse or hyperbola
+the distance between the conic center and one of its  foci.
 : {{Example|1=<code>LinearEccentricity[4x^2 - y^2 + 16x + 20 = 0]</code> returns 2.24}}
+For circle, return 0
+For parabola, the distance between the focus and the vertex