MCQ
The eccentricity of curve ${x^2} - {y^2} = 1$ is
  • A
    $\frac{1}{2}$
  • B
    $\frac{1}{{\sqrt 2 }}$
  • C
    $2$
  • $\sqrt 2 $

Answer

Correct option: D.
$\sqrt 2 $
d
(d) Since it is a rectangular hyperbola,

therefore eccentricity $e = \sqrt 2 $.

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