Q95 / 160 · AP EAMCET 2018 (22 Apr Shift 1) · Mathematics

The line $y=6 x+1$ touches the parabola $y^2=24 x$. The coordinates of a point $P$ on this line, from which the tangent to $y^2=24 x$ is perpendicular to the line $y=6 x+1$, is

  • A
    $(-1,-5)$
  • B
    $(-2,-11)$
  • Correct answer
    C
    $(-6,-35)$
  • D
    $(-7,-41)$

Solution

Given, equation of line is y = 6x + 1 and equation of pa rab ola is $y^2=24 x$. The locus of the point of intersection of perpendicular tangent to a parabola is its directrix. So, required point is the point of intersection of y = 6x + 1 and direc trix x = − 6. Hence, its coordinates are (− 6, − 35).

Hence, the correct answer is option: 'C'.

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