A hyperbola, having the transverse axis of length , is confocal with the ellipse . Then its equation is
- (A)✓ Correct
- (B)
- (C)
- (D)
Answer: (A)
Solution
The ellipse has , , so and .
For the hyperbola with transverse axis , we have .
Since they are confocal, , so .
For a hyperbola, .
Therefore, the equation is or .
For the hyperbola with transverse axis , we have .
Since they are confocal, , so .
For a hyperbola, .
Therefore, the equation is or .
JEE Advanced · 2007 · 08 Apr 2007 · Paper 1 · Single correct option