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Question

The equation of the hyperbola having its eccentricity 2 and the distance between foci 8, is ________________________.

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Solution

For the hyperbola,
Eccentricity is given i.e. 2 and distance between foci is 8
i.e. 2ae=8i.e. 2a×2=8i.e. a=2i.e. b2=a2-1+e2=a2e2-1i.e. b2=4-1+4 =4+3 b2=+12 equation of hyperbola is x24-y212=1 i.e. 3x2-y2=12

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