For the Hyperbola which of the following remains constant when varies ?
abscissae of vertices
abscissae of foci
eccentricity
directrix
As we learnt in
Coordinates of foci -
- wherein
For the ellipse
Here
Coordnita of focus = ae
Option 1)
abscissae of vertices
Incorrect
Option 2)
abscissae of foci
Correct
Option 3)
eccentricity
Incorrect
Option 4)
directrix
Incorrect
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