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If the straight line $y=mx+c$ is parallel to the axis of the parabola $y^2=lx$ and intersects the parabola at $\bigg ( \large\frac{c^2}{8}$$,c\bigg)$ then the length of the latus rectum is

\[\begin {array} {1 1} (a)\;2 & \quad (b)\;3 \\ (c)\;4 & \quad (d)\;8 \end {array}\]
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(d) 8
answered Nov 7, 2013 by pady_1
 
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