\( P C \) is the normal at \( P \) to the parabola \( y^{2}=4 a x, ... VIDEO
\( P C \) is the normal at \( P \) to the parabola \( y^{2}=4 a x, C \)
\( \mathrm{P} \) being on the axis. \( C P \) is produced outwards to \( Q \) so
W that \( P Q=C P \). The locus of \( Q \) is a parabola which has focus:
(1) \( (a, 0) \)
(2) \( (-a, 0) \)
(3) \( (-2 a, 0) \)
(4) \( (2 a, 0) \)
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