| 1. | This form is analogous to the equation for a conic section:
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| 2. | It is ovate-conic in outline, thin and translucent.
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| 3. | The conic sections of the Euclidean plane have many distinguishing properties.
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| 4. | A point on just one tangent line is on the conic.
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| 5. | A pencil of conics can represented algebraically in the following way.
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| 6. | He studied conic sections, cubic equations and problems of artillery.
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| 7. | The imperforate, solid shell has an elevated-conic shape.
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| 8. | An ellipse is a conic section that does not intersect this line.
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| 9. | See the section Conic section and quadratic form, above.
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| 10. | In his " Treatise on the Conic Sections"
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मोबाइल