In Exercises 1–8, find the eccentricity of the ellipse. Then find and graph the ellipse’s foci and directrices. 1. 16x2 + 25y2 = 400 2. 2x2 + y2 = 2 3. 3x2 + 2y2 = 6 4. 6x2 + 9y2 = 54 5. 7x2 + 16y2 = 112 6. 2x2 + y2 = 4 7. 9x2 + 10y2 = 90 8. 169x2 + 25y2 = 4225

Question

In Exercises 1–8, find the eccentricity of the ellipse. Then find and graph the ellipse’s foci and directrices.

1. 16x2 + 25y2 = 400

2. 2x2 + y2 = 2

3. 3x2 + 2y2 = 6

4. 6x2 + 9y2 = 54

5. 7x2 + 16y2 = 112

6. 2x2 + y2 = 4

7. 9x2 + 10y2 = 90

8. 169x2 + 25y2 = 4225

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