A set of parallel chords of the parabola \( y^{2}=4 a x \)
\( \math... VIDEO
A set of parallel chords of the parabola \( y^{2}=4 a x \)
\( \mathrm{P} \) have their midpoints on:
W
(1) Any straight line through the vertex
(2) Any straight line through the focus
(3) A straight line parallel to the axis
(4) Another parabola
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