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Solution


Q.

Let (2, 3) be the focus of a parabola and x+y=0 and x-y=0 be its two tangents, then equation of its directrix will be
1 2x-3y=0  
2 3x+4y=0  
3 x+y=5  
4 12x-5y+1=0  

Ans.

(1)

Mirror image of focus in the tangent of parabola lie on its directrix.