2019高考数学二轮复习专题七选考内容第二讲不等式选讲课件理.ppt

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考点一,绝对值不等式的解法,考点二,不等式的证明,考点三,含绝对值不等式的恒成立问题,在研究曲线交点的恒成立问题时数形结合,揭示问题所蕴含的几何背景,发挥形象思维与抽象思维的优势,可直接解决问题,数形 结合法,对于一些含参不等式恒成立问题,若直接从主元入手非常困难或不可能解决问题时,可转换思维角度,将主元与参数互换,常可得到简捷的解法,更换 主元法,运用“f(x)a恒成立f(x)maxa,f(x)a恒成立 f(x)mina”可解决恒成立中的参数取值范围问题,分离 参数法,Thank You!,

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