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1、欢 迎 光 临Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for
2、 .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.近五年高考中圆锥曲线（椭圆、双曲线、抛物线） 所占比例及题型分布年度考察题题型总总分值值2009一道选择题选择题 3分，一道填空题题2 分，一道解答题题7分12分2010选择题选择题 一道3分，填空题题两道共 4分，解答题题一道8分15分2011选择题选择题 一道3
3、分，填空题题一道2 分，解答题题一道8分13分2012选择题选择题 一道3分，填空题题一道2 分，解答题题一道8分13分2013选择题选择题 一道3分，填空题题两道共 4分，解答题题一道8分15分Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyrig
4、ht 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.椭圆的标准方程及其性质刘艳超 Evaluation only.Evaluation
5、only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.C
6、reated with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.教学目标：v1、理解椭圆的定义2、掌握椭圆的两种标准方程的联系及区别v3、掌握椭圆的性质，特别是长轴长和短轴长及离 心率教学重难点：1、重点：椭圆的定义、椭圆标准方程的认识，椭 圆的性质。2、难点：椭圆的性质，特别是长轴长和短轴长及 离心率的应用Evaluation only.Evaluation only. Created wit
7、h Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspos
8、e.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.我们学过的圆的定义是什么？平面内到一定点的距离等于定长的点的轨迹 定点是圆心，定长为半径OA半径圆心知识回顾Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NE
9、T 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyr
10、ight 2004-2011 Aspose Pty Ltd. 平面内到两定点F1、F2的距离之和等于常数2a(大于|F1F2|)的点的轨迹叫做椭圆 这两个定点F1和F2叫做椭圆的焦点， 两个焦点的距离|F1F2|=2c叫做椭圆的焦距F1F2M知识点一：椭圆的定义知识点一：椭圆的定义演示椭圆的定义 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile
11、5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose
12、 Pty Ltd.OxyF1F2M知识点二：知识点二：椭圆的标准方程步骤一：建立直角坐标系, 设动点坐标M(x，y)步骤二：找关系式|MF1|+|MF2|=2a |F1F2|=2c(c0) F1（-c,0) F2(c,0)步骤三：列方程步骤四：化简方程步骤五：验证求曲线方程的步骤:Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.
13、 Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd
14、.yMxyx注：c2=a2-b2焦 点 在 x 轴焦 点 在 y 轴焦点坐标F1（-c,0) F2(c,0)焦点坐标F1（0，-c) F2(0,c)Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty
15、Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.OXYF1F2M(- c,0)(c,0 )YXOF1F2 M(0,- c)(0 , c)椭圆的标准方程的再认识：（1）椭圆标准方程的
16、形式：左边是两个分式的平方和， 右边是1（3）椭圆的标准方程中 三个参数a、b、c满足 a2=b2+c2。（2）椭圆的标准方程中， x2与y2的分母哪一个大，则焦点在哪一个轴上。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0
