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1、 高三总复习 数学 (大纲版)第二节 等差数列 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.高三总复习 数学 (大纲版)Evaluation only.Evaluation only.
2、 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.高三总复习 数学 (大纲版)考 纲 要 求1.理解等差数列的概念 2.掌握等差数列的通项公式和前n项和 公式,并能运用公式解决一些简单的 实际问题 考 试 热 点1.以选择题 或填空题的形式考查等差数 列
3、的基本运算 2.以考查等差数列的通项公式及性质为 主,同时考查等差数列的函数性.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.高三总复习 数学 (大纲版)Evaluation only.
4、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.高三总复习 数学 (大纲版)1如果一个数列从第2项起,每一项与它的前一项的差等于同一个常数,那么这个数列就叫做等差数列,这个常数叫做等差数列的,通常用字母 表示,定义的表达
5、式为 (nN*)公差an1anddEvaluation 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.高三总复习 数学 (大纲版)等差中项 充要 Evaluation only.Evaluation only
6、. 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.高三总复习 数学 (大纲版)5对于正整数m、n、p、q,若mnpq,则等差数列中am、an、ap、aq的关系为.6等差数列的通项是关于正整数n的 函数(d0),(n,an)是直线上的一群孤立的点,ana
7、nb(a、b是常数)是an成等差数列的条件amanapaq一次充要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.高三总复习 数学 (大纲版)7等差数列an的首项是a1,公差为d,若其前n
8、项和可以写成SnAn2Bn,则A ,B ,当d0时它表示函数8数列an的前n项和SnAn2Bn是an成等差数列的充要条件9等差数列的增减性d0时为数列,且当a10时前n项和Sn有最值二次小大递增递减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.Copyri
9、ght 2004-2011 Aspose Pty Ltd.高三总复习 数学 (大纲版)1在等差数列an中,已知a32,则该数列的前5项之和为( )A10 B16C20 D32答案:AEvaluation 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
10、-2011 Aspose Pty Ltd.高三总复习 数学 (大纲版)2如果数列an是递增等差数列,前三项和为12,前三项积为 48,则它的首项是( )A1 B2C4 D6答案:BEvaluation 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-
11、2011 Aspose Pty Ltd.高三总复习 数学 (大纲版)答案:3n2Evaluation 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.高三总复习 数学 (大纲版)4等差数列an的首项为70,公差
12、为9,则这个数列中绝对值 最小的项的值是_答案:2Evaluation 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.高三总复习 数学 (大纲版)Evaluation only.Evaluation only
13、. 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.高三总复习 数学 (大纲版)Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile
14、 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.高三总复习 数学 (大纲版)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
15、Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.高三总复习 数学 (大纲版)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.Copy
16、right 2004-2011 Aspose Pty Ltd.高三总复习 数学 (大纲版)经检验,符合题意的正整数只有m2.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.高三总复习 数学