高一数学函数表达式赵金龙.ppt

2003.10.12 x y O Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 换元法 凑整法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 待定系数法 练习 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 如图是函数 f(x)的图象，OC段是射线，而OBA是抛物线的一部分，试写出f(x)的表达式 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 方程组法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 抽象函数问题： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 更多资源 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 某服装个体户在进一批服装时，进价 按原价打了七五折，他打算对该批服装定 一新价标在价目卡上，并标明按该价降价 20%销售，这样，仍可获得25%的纯利， 这个个体户给这批服装定的新标价与原价 之间的函数关系是 . Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 某地区上年度电价为0.8元/kW·h，年用电量为akW·h，本年度计划将电价降到0.55元/kW·h至0.75元/kW·h之间，而用户期望电价为0.4元/kW·h，经测算，下调电价后新增的用电量与实际电价和用户期望电价的差成反比（比例系数为k）．该地区电力的成本价为0.3元/kW·h． (Ⅰ)写出本年度电价下调后，电力部门的收益y与实际电价x的函数关系式； (Ⅱ)设k=0.2a，当电价最低定为多少时仍可保证电力部门的收益比上年至少增长20%？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.