Mathematics · Hyperbola

JEE Main 2026 — 6 April, Evening Shift — Question 30

The eccentricity of an ellipse EE with centre at the origin O is 32\frac{\sqrt3}{2} and its directrices are x=±46/3x = ±4\sqrt6/3. Let H:x2a2−y2b2=1H: \frac{x²}{a²} - \frac{y²}{b²} = 1 be a hyperbola whose eccentricity is equal to the length of semi-major axis of E, and whose length of latus rectum is equal to the length of minor axis of E.E. Then the distance between the foci of HH is :

  1. Option A:

    427\frac{4 \sqrt{2}}{\sqrt{7}}

  2. Option B:

    427\frac{4 \sqrt{2}}{7}

  3. Option C:

    47\frac{4}{\sqrt{7}}

  4. Option D:

    87\frac{8}{7}

    Correct

Answer: D

Step-by-step solution

e=32\mathrm{e}=\frac{\sqrt{3}}{2} ae=463\frac{\mathrm{a}}{\mathrm{e}}=\frac{4 \sqrt{6}}{3} a=22\mathrm{a}=2 \sqrt{2} (ae)2=a2−b2(\mathrm{ae})^{2}=\mathrm{a}^{2}-\mathrm{b}^{2} b2=2\mathrm{b}^{2}=2 so E:x28+y22=1E: \frac{x^{2}}{8}+\frac{y^{2}}{2}=1 Now eH=22⇒ b2=7a2\mathrm{e}_{\mathrm{H}}=2 \sqrt{2} \Rightarrow \mathrm{~b}^{2}=7 \mathrm{a}^{2} 2 b2a=22⇒a=27\frac{2 \mathrm{~b}^{2}}{\mathrm{a}}=2 \sqrt{2} \Rightarrow \mathrm{a}=\frac{\sqrt{2}}{7} (aeH)2=a2+b2=8a2=1649\left(\mathrm{ae}_{\mathrm{H}}\right)^{2}=\mathrm{a}^{2}+\mathrm{b}^{2}=8 \mathrm{a}^{2}=\frac{16}{49} aeH=47\mathrm{ae}_{\mathrm{H}}=\frac{4}{7} Distance between focii =2aeH=87=2 \mathrm{ae}_{\mathrm{H}}=\frac{8}{7}

Answer key and solution verified before publishing.

Practise Hyperbola

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Exam
JEE Main 2026
Subject
Mathematics
Chapter
Hyperbola
Topic
Introduction to Hyperbola
The eccentricity of an ellipse E with centre at the origin O is… | JEE Main 2026 PYQ with Solution · DhiX AI