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Question

The eccentricity of the ellipse 12x2+7y2=84 is equal to 


  1. 57

  2. 512

  3. 512

  4. 57


Solution

The correct option is B

512


12x2+7y2=84x27+y212=1a2=7; b2=12Focal length, c=b2a2c=127=5e=ca=512

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