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If $2x+3y+12=0$ and $x-y+ 4 \lambda=0$ are conjugate with respect to the parabola $y^2=8x$ then $\lambda=$

\[\begin {array} {1 1} (1)\;2 & \quad (2)\;-2 \\ (3)\;3 & \quad (4)\;-3 \end {array}\]
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1 Answer

(4) -3
answered Nov 7, 2013 by pady_1
 
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