| 用代数的方法证明过定点作圆锥曲线的切线条数 |
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| 引用本文： | 徐喜明.用代数的方法证明过定点作圆锥曲线的切线条数[J].江西教育学院学报,2004,25(3):83-84. |
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| 作者姓名： | 徐喜明 |
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| 作者单位： | 深圳市龙城中学高中部,广东,深圳,518172 |
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| 摘 要： | 平面解析几何是一门用代数方法解决几何问题的科学,在研究过定点作圆锥曲线的切线条数时,若仅用数形结合的方法(从图形直观)来判断,则不同具有科学的纯粹性和完备性。
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| 关 键 词： | 定点的位置 圆锥曲线 切线 判别式 |
| 文章编号： | 1005-3638(2004)03-0083-02 |
| 修稿时间： | 2004年2月26日 |
Demonstrating the Number of the Tangent Lines of Circular Cone Curves through Fixed Points by Means of Algebra |
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| XU Xi-ming.Demonstrating the Number of the Tangent Lines of Circular Cone Curves through Fixed Points by Means of Algebra[J].Journal of Jiangxi Institute of Education,2004,25(3):83-84. |
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| Authors: | XU Xi-ming |
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| Abstract: | Plane analytic geometry is a science that offers solution to geometry problems by means of algebra. On studying the tangent lines with circular cone curves through the fixed point, if we judge it with the number-figure approach, purity and perfection both will be achieved scientifically. |
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| Keywords: | location of fixed points circular cone curves tangent lines discriminant |
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