Medium MCQ +4 / -1 PYQ · JEE Mains 2021

A tangent is drawn to the parabola y2 = 6x which is perpendicular to the line 2x + y = 1. Which of the following points does NOT lie on it?

  1. A (0, 3)
  2. B ($-$6, 0)
  3. C (4, 5)
  4. D (5, 4) Correct answer

Solution

Equation of tangent : $y = mx + {3 \over {2m}}$<br><br>${m_T} = {1 \over 2}$ ($\because$ perpendicular to line $2x + y = 1$)<br><br>$\therefore$ tangent is : $y = {x \over 2} + 3$<br><br>$\Rightarrow x - 2y + 6 = 0$

About this question

Subject: Mathematics · Chapter: Conic Sections · Topic: Parabola

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