函数是“数与代数”的核心内容,更是难点.特别是二次函数综合问题中,涉及到的知识点多,蕴含的数学思想方法集中,能全面考查学生获取数学信息以及数学思想方法分析问题和解决问题的能力,因而成为广大师生关注的热点问题.本文以2011年恩施自治州中考数学题为例予以分析.题如图1,在平面直角坐标系中,直线AC:y=(4/3)x+8与x轴交与点A,与y轴交与点C,抛物 Function is the core content of “number and algebra ”, especially in the complex function of quadratic function, there are many points of knowledge involved, and the methods of mathematical thought are concentrated, which can comprehensively examine the students’ access to mathematical information and mathematical thought Method to analyze the problem and the ability to solve the problem, which became the focus of the majority of teachers and students.This article takes the entrance exam in Enshi Autonomous Prefecture in 2011 as an example to be analyzed.As shown in Figure 1, in a rectangular plane coordinate system, the line AC: y = (4/3) x + 8 and the x-axis intersection with the point A, y-axis intersection with the point C, parabolic