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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Coordinate Geometry
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A ellipse is the locus of a point which moves in a plane such that its distance from a fixed point (i.e focus) is a constant ratio from a _____________

$\begin{array}{1 1}(a)\;\text{directix}\\(b)\;\text{focus}\\(c)\;\text{locus of a point}\\(d)\;\text{none of these}\end{array}$

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A ellipse is the locus of a point which moves in a plane such that its distance from a fixed point (i.e focus) is a constant ratio from a fixed line(directix).This ratio is denoted by e.
For ellipse e < 1
Hence (a) is the correct answer.
answered Feb 6, 2014 by sreemathi.v
 

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