(通用版)2020版高考数学大一轮复习第30讲等比数列及其前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.理解等比数列的概念,掌握等比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比关系,并能用等比数列的有关知识解决相应的问题. 3.了解等比数列与指数函数的关系.,考试说明,知识聚焦,an=a1qn-1,an=amqn-m,na1,apaq,qm,对点演练,题组一 常识题,题组二 常错题,索引:“G2=ab”是“a,G,b成等比数列”的必要不充分条件;运用等比数列的前n项和公式时,忽略q=1的情况;对等比数列的性质不熟导致出错.,探究点一 等比数列的基本运算,探究点二 等比数列的性质,探究点三 等比数列的判定与证明,【备选理由】 例1考查等比数列的基本运算;例2重点考查等比数列的性质;例3考查等比数列的判定、通项公式与前n项和公式.,

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