Difference between revisions of "Focus Command"

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<noinclude>{{Manual Page|version=4.2}}</noinclude>
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<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|conic}}
{{command|conic}}
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; Focus( <Conic> ): Yields (all) foci of the conic section.
; Focus[ <Conic> ]: Yields (all) foci of the conic section.
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:{{Example|1=<code>Focus(4x^2 - y^2 + 16x + 20 = 0)</code> returns the two foci of the given hyperbola: ''A''=(-2, -2.24) and ''B''=(-2, 2.24).}}
:{{Example|1=<code>Focus[4x^2 - y^2 + 16x + 20 = 0]</code> returns the two foci of the given hyperbola: ''A''=(-2, -2.24) and ''B''=(-2, 2.24).}}
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{{Note|1=See also the [[Directrix Command|Directrix]] command.}}

Latest revision as of 15:32, 4 October 2017

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