Eccentricity of the curve \( x^{2}-y^{2}=a^{2} \) is \( \mathrm{P} ...

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Eccentricity of the curve \( x^{2}-y^{2}=a^{2} \) is
\( \mathrm{P} \)
(1) 2
(2) \( \sqrt{2} \)
W.
(3) 4
(4) None of these
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