单击此处编辑母版文本样式,高考数学总复习,第二章函数,人教,B,版,第,2,章 第八节,高考数学总复习,人教,B,版,第,八 节,函数与方程、函数模型及其应用,函数零点的判断,二分法,f,(1),2,f,(1.5),0.625,f,(1.25),0.984,f,(1.375),0.260,f,(1.438),0.165,f,(1.4065),0.052,正、反比例函数,一次函数模型,二次函数模型,分段函数问题,级别,全月纳税所得额,税率,1,不超过,500,元部分,5%,2,超过,500,元至,2000,元部分,10%,3,超过,2000,元至,5000,元部分,15%,9,超过,100000,元部分,45%,函数模型的选取,综合应用,x,1,2,3,4,5,6,f,(,x,),123.56,21.45,7.82,11.57,53.76,126.49,