A hyperbola passes through the foci of the ellipse x 2 25 + y 2 16 = 1 and its transverse and conjugate axes…

A hyperbola passes through the foci of the ellipse x225+y216=1 and its transverse and conjugate axes coincide with major and minor axes of the ellipse, respectively. If the product of their eccentricities is one, then the equation of the hyperbola is:
  1. x29-y216=1
  2. x2-y2=9
  3. x29-y225=1
  4. x29-y24=1

Solution

For ellipse e1=1-b2a2=35

for hyperbola e2=53

Let hyperbola be

x2a2-y2b2=1

it passes through 3,09a2=1

a2=9

b2=a2e2-1

=9259-1=16

Hyperbola is

x29-y216=1

option 1

Asked in: JEE Main 2021 (25 Feb Shift 2)

Practice more Hyperbola questions on Aicharya