2019高考数学二轮复习专题六函数、不等式、导数第二讲小题考法——基本初等函数、函数与方程课件理.ppt

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考点(一),基本初等函数的图象与性质,考点(二),函数的零点,对于给定的函数不能直接求解或画出图象的,常分解转化为两个能画出图象的函数的交点问题,数形 结合法,利用零点存在性定理,利用该定理只能确定函数的某些零点是否存在,必须结合函数的图象和性质(如单调性)才能确定函数有多少个零点,定理法,直接求零点,令f(x)0,则方程解的个数即为函数零点的个数,直接法,必备知能自主补缺,关于直线yx对称,两图象的对称性,0a1时,在(0,)上是减函数; a1时,在(0,)上是增函数,0a1时,在R上是减函数; a1时,在R上是增函数,单调性,R,(0,),值域,(0,),R,定义域,图象,ylogax(a0且a1),yax(a0且a1),解析式,Thank You!,

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