(通用版)2020版高考数学大一轮复习第29讲等差数列及其前n项和课件文新人教A版.pptx

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课前双基巩固课堂考点探究教师备用例题,1.理解等差数列的概念,掌握等差数列的通项公式与前n项和公式. 2.能在具体的问题情境中识别数列的等差关系,并能用等差数列的有关知识解决相应的问题. 3.了解等差数列与一次函数的关系.,考试说明,知识聚焦,an-an-1=d,an=a1+(n-1)d,an=am+(n-m)d,ap+aq,2ak,等差,dn+a1-d,一次函数,孤立,递增,大,递减,常数列,孤立的点,二次函数,小,对点演练,题组一 常识题,题组二 常错题,索引:等差数列概念中的两个易误点,即同一个常数与常数;不能正确应用等差数列的性质;对等差数列的通项公式和前n项和公式之间的关系处理不清.,探究点一 等差数列的基本运算,探究点二 等差数列的性质,探究点三 等差数列的判定与证明,探究点四 等差数列前n项和Sn的最值,【备选理由】 例1是等差数列应用题,涉及等差数列基本量的计算;例2考查等差数列的基本性质及等差数列与不等式的综合应用;例3主要考查等差数列的判断以及通项公式;例4是等差数列的综合问题.这四个问题的求解都需要一定的归纳与转化能力.,

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