Question: Verify that if e > 1, then Eq. (11) defines a hyperbola of eccentricity e, with its focus at the origin and directrix at x

Verify that if e > 1, then Eq. (11) defines a hyperbola of eccentricity e, with its focus at the origin and directrix at x = d.

7= ed 1+ ecos@

7= ed 1+ e cos 0

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