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A line of slope lambda(0 lt lambda lt 1)...

A line of slope `lambda(0 lt lambda lt 1)` touches the parabola `y+3x^2=0` at `P`. If `S` is the focus and `M` is the foot of the perpendicular of directrix from `P` , then `tan/_M P S` equals (A) `2lambda` (B) `(2lambda)/(-1+lambda^2)` (C) `(1-lambda^2)/(1+lambda^2)` (D) none of these

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