JEE Main 202226 JulyMorning Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 26 July
- Shift
- Morning Shift
- Subject
- Mathematics
- Chapter
- Hyperbola
JEE Main 2022 · 26 July · Morning Shift · Mathematics · Hyperbola
Let the tangent drawn to the parabola y ^ 2 = 24x at the point (α,...
Let the tangent drawn to the parabola at the point \left(\alpha, \beta\right)2x + 2y = 5\dfrac{{x}^{2}}{{\alpha}^{2}} - \dfrac{{y}^{2}}{{\beta}^{2}} = 1 does NOT pass through the point:
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
Given, the tangent drawn to the parabola at the point \left(\alpha, \beta\right)2x + 2y = 5 has slope
And \left(\alpha, \beta\right){y}^{2} = 24x{\beta}^{2} = 24\alphay\beta = 12 \left(x + \alpha\right) so its slope will be \dfrac{12}{\beta} =, so
= \left(10, 16\right) to ,
First finding slope of the tangent 0⇒ {\left(\dfrac{dy}{dx}\right)}_{\left(10, 16\right)} = \dfrac{144 \times 10}{36 \times 16} = \dfrac{5}{2},the normal will be\dfrac{- 2}{5}y - 16 = \dfrac{- 2}{5}\left(x - 10\right)⇒ 2x + 5y = 100 will not satisfy the given line.