(浙江专版)2020版高考数学一轮复习第二章不等式第一节不等关系与不等式课件.ppt

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第,二,章,不等式,不等关系与不等式,第,一,节,课前双基落实 想一想、辨一辨、试一试、全面打牢基础,课堂考点突破 自主研、合作探、多面观、全扫命题题点,课后三维演练 基础练、题型练、能力练、全练力保全能,想一想、辨一辨、试一试、全面打牢基础,课,前,双,基,落,实,必,过,教,材,关,必,过,易,错,关,自主研、合作探、多面观、全扫命题题点,课,堂,考,点,突,破,作差法,判断商与1的大小关系,得出结论,要特别注意,当商与1的大小确定后,必须对商式分子、分母的正负作出判断,这是用作商法比较大小时最容易漏掉的关键步骤,作商法,其基本步骤:作差,变形,判断符号,得出结论用作差法比较大小的关键是判断差的正负,常采用配方、因式分解、分子(分母)有理化等变形方法,

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