抛物线最值问题求法word版本.ppt

抛物线中常见最值问题求法抛物线中常见最值问题求法Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.一、一、复习引入复习引入1.1.抛物线的定义抛物线的定义:2.2.抛物线的标准方程和性质抛物线的标准方程和性质:Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.二、典例分析二、典例分析M MF Fx xy yA AEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.M MF Fx xy yA AEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.F FA AP Py yx xEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.y yF FA AP Px xEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.AM MF Fx xy yEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.变式训练变式训练1：x xM MF Fy yAQ QEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.变式训练变式训练2：AM MF Fx xy yEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.M MF Fx xy yEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.AM MF Fx xy yEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.x xy yo oEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.三、课时小结三、课时小结 抛物线最值问题常用求法：抛物线最值问题常用求法：1 1、利用定、利用定义求最求最值；2 2、构造二次函数，利用配方法求最、构造二次函数，利用配方法求最值；3 3、利用作切、利用作切线法求最法求最值；Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.四、课堂练习四、课堂练习F Fx xy yAB BMEvaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.分析：将椭圆上任意一点分析：将椭圆上任意一点Q与点与点P的距离表示成一个变量的函数然后的距离表示成一个变量的函数然后求最值。求最值。xyQ PEvaluation 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.拓展题拓展题:四、课后作业：讲义四、课后作业：讲义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.