With a given point and line as focus and directrix, a series of ell...

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With a given point and line as focus and directrix, a series of ellipses are described. The locus of the extremities of
\( \mathrm{P} \) their minor axis is

W
(1) an ellipse
(2) a parabola
(3) a hyperbola
(4) none of these
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