| 三次函数零点判别法 |
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| 引用本文： | 玉邴图. 三次函数零点判别法[J]. 文山学院学报, 2014, 0(6): 43-47 |
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| 作者姓名： | 玉邴图 |
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| 作者单位： | 广南县第一中学,云南广南663300 |
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| 摘 要： | 三次函数是重要的初等函数之一,其性质是数学教学的研究重点。文章将根据其极值点的分布情况,应用韦达定理推导出三次函数零点的一种判别法,为解决三次函数零点个数及其相关问题提供了借鉴和参考。
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| 关 键 词： | 三次函数 零点 韦达定理 |
On the Test of Zero Vector of Cubic Function |
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| YU Bing-tu. On the Test of Zero Vector of Cubic Function[J]. Journal of Wenshan University, 2014, 0(6): 43-47 |
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| Authors: | YU Bing-tu |
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| Affiliation: | YU Bing-tu (No. 1 Middle School, Guangnan 663300, China) |
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| Abstract: | Cubic function is one of important elementary functions and its properties are the focus of mathematics teaching. The paper deduces a test of zero vector of cubic function from Vieta’s theorem, based on the distributions of its extreme value points, which provides a reference basis for the number of zero vector and its related problems. |
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| Keywords: | Cubic function zero vector Vieta’s theorem |
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