If one end of a focal chord A B of the parabola y 2 = 8 x is at A 1 2 , - 2 , then the equation of the tangent to it at B is:

Question

If one end of a focal chord A B of the parabola y 2 = 8 x is at A 1 2 , - 2 , then the equation of the tangent to it at B is:, 2 x + y - 24 = 0, x - 2 y + 8 = 0, x + 2 y + 8 = 0, 2 x - y - 24 = 0

MARKS App · Accepted Answer

Let 1 2 , - 2 is 2 t 2 , 4 t ⇒ t = - 1 2 Parameter of other end of focal chord is t = 2 ⇒ Point is 8 , 8 ⇒ Equation of tangent is 8 y - 4 x + 8 = 0 ⇒ 2 y - x = 8

Search any question & find its solution

Looking for more such questions to practice?