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JEE Main Math Class 11 Coordinate Geometry Part 2 Questions

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Question : 69

Total: 100

Let S={(x,y)∈R2:‌

=1}
where r≠±1 Then S represents:

[Jan. 10, 2019 (II)]

a hyperbola whose eccentricity is ‌
2
√1−r
, when 0<r<1
an ellipse whose eccentricity is √‌
2
r+1
, when r>1
a hyperbola whose eccentricity is ‌
2
√r+1
, when 0<r<1
an ellipse whose eccentricity is ‌
1
√r+1
, when r>1

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