Maths-
General
Easy

Question

Two perpendicular tangents to y2 = 4ax always intersect on the line, if

  1. x = a    
  2. x + a = 0    
  3. x + 2a = 0    
  4. x + 4a = 0    

The correct answer is: x + a = 0


    Two perpendicular tangents to y2 = 4ax always intersect on directrix
    thereforex = – a rightwards double arrow x + a = 0

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