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Eccentricity of hyperbola ((x ^(2))/(k )...

Eccentricity of hyperbola `((x ^(2))/(k ) - ( y ^(2))/(k)) =1 ( k lt 0)` is

A

1) `sqrt(1+k )`

B

2) ` sqrt(1-k )`

C

3) `sqrt(2)`

D

4) ` 2sqrt(2)`

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The correct Answer is:
D
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