Ellipse in Terms of Focus and Directrix

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Given a point (the focus) and a line (the directrix), we examine the locus of the points whose distance from the focus is k times the distance from the directrix. With k<1, the curve is an ellipse.

Expressions

Name Input
Focus 1 Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
Focus 2 Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
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