[MNR 1990; Kurukshetra CEE 1998; DCE 2000; Pb. CET 2004]
A) $ m=1 $
B) $ m=2 $
C) $ m=4 $
D) $ m=3 $
Correct Answer: A
From condition for tangent to a parabola, $ 1=\frac{1}{m} $
therefore $ m=1 $ .
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