Gujarati
10-2. Parabola, Ellipse, Hyperbola
easy

The eccentricity of curve ${x^2} - {y^2} = 1$ is

A

$\frac{1}{2}$

B

$\frac{1}{{\sqrt 2 }}$

C

$2$

D

$\sqrt 2 $

Solution

(d) Since it is a rectangular hyperbola,

therefore eccentricity $e = \sqrt 2 $.

Standard 11
Mathematics

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