Eccentricity of the conic $16{x^2} + 7{y^2} = 112$ is
Eccentricity of the conic $16{x^2} + 7{y^2} = 112$ is
- A
$3\over \sqrt 7 $
- B
$7\over{16}$
- C
$3\over4$
- D
$4\over3$
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