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What is the equation of the ellipse whose vertices are ( ± 5, 0) and foci are at ( ± 4, 0)?

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What is the equation of the ellipse whose vertices are ( ± 5, 0) and foci are at ( ± 4, 0)?

a. x2/25 + y2/9 = 1

b. x2/16 + y2/9 = 1

c. x2/25 + y2/16 = 1

d. x2/9 + y2/25 = 1

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1 Answer

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Best answer

Correct option a. x2/25 + y2/9 = 1

Explanation:

c = 4, a = 5

b2 = 25 - 16 = 9

∴ Equation of ellipse is x2/25 + y2/9 = 1

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