Finding the equation of an ellipse from foci and directrices

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SUMMARY

The equation of an ellipse can be derived from its foci and directrices. Given foci at (-2,0) and (2,0), and directrices at x=-8 and x=8, the standard form of the ellipse can be established. The distance between the foci is 4, which indicates that the semi-major axis is 2. The directrices provide the necessary parameters to finalize the equation of the ellipse.

PREREQUISITES
  • Understanding of conic sections, specifically ellipses
  • Knowledge of the standard form of an ellipse equation
  • Familiarity with the concepts of foci and directrices
  • Basic algebra skills for manipulating equations
NEXT STEPS
  • Study the derivation of the standard form of an ellipse equation
  • Learn about the properties of ellipses, including eccentricity
  • Explore examples of finding equations of conic sections from given parameters
  • Practice problems involving the calculation of distances between foci and directrices
USEFUL FOR

Students studying precalculus, mathematics educators, and anyone interested in mastering the properties and equations of ellipses.

kasse
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How can one find the eq. of an ellipse given that the foci are (-2,0) and (2,0) and that the directrices are x=-8 and x=8?
 
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This seems like a homework question. What have you tried?
 
Moved to precalc homework.

Kasse, you need to show your own work in order to get our help. What are the equations that define an ellipse?
 

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