Give foci and corresponding directrices of ellipses centered at the origin of the xy-plane. In each case,

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Give foci and corresponding directrices of ellipses centered at the origin of the xy-plane. In each case, use the dimensions in Figure 11.47 to find the eccentricity of the ellipse. Then find the ellipse’s standard-form equation in Cartesian coordinates.


In Figure 11.47


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Thomas Calculus Early Transcendentals

ISBN: 9780321884077

13th Edition

Authors: Joel R Hass, Christopher E Heil, Maurice D Weir

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