抛物线定义及性质的应用教学文稿.ppt

抛物线定义及性质的应用学习目标：Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.抛物线的性质抛物线的性质(1)范围范围(2)对称对称性性(3)顶点顶点x0，yR关于关于x轴对称轴对称(4)离心率离心率以以y2=2px(p0)为例为例.FM.e=1（，）（，）Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.例例若点若点M到点到点F（4 4，0 0）的距离比它到直线）的距离比它到直线l:x5 50 0的距的距离少离少1 1，求点，求点M的轨迹方程的轨迹方程.xlFOyM方法：定义法方法：定义法方法：直接法方法：直接法Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.例例正三角形的一个顶点位于坐标原点，另外两个顶点在抛正三角形的一个顶点位于坐标原点，另外两个顶点在抛物线物线（）上，求三角形边长（）上，求三角形边长Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.（，）（，）Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.练习从抛物线上一点引抛物线准线的垂线，垂足为，且丨丨，为抛物线焦点，则面积为Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.小结.利用抛物线的定义及性质解标准方程。.利用代数方法解决几何问题。Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.