Locus of the middle points of the parallel chords with gradient $m$ of the rectangular hyperbola $xy = c^2 $ is
Locus of the middle points of the parallel chords with gradient $m$ of the rectangular hyperbola $xy = c^2 $ is
- A
$y + mx = 0$
- B
$y - mx = 0$
- C
$my - x = 0$
- D
$my + x = 0$
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