$\"\"$

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Distance between vertex and focus is $\"\"$ .

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Distance from the vertex to the center is $\"\"$ greater than the distance from the focus to the center is $\"\"$ .

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Eccentricity of the mirror is $\"\"$ .

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Solve the system of equations.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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The equation of ellipse is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in equation of ellipse.

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$\"\"$ .

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$\"\"$

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The equation of ellipse is $\"\"$ .