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高中数学新课程(人教A版)必修一第3.1.1节讲了方程的根、函数的零点问题:方程f(x)=0有实数根函数y=f(x)的图象与x轴有公共点函数y=f(x)有零点,可见函数的零点从不同的角度将数与形,函数与方程有机地联系在一起.从函数的角度来看,零点就是使得函数值为0的实数;从方程的角度来看,零点就是相应方程f(x)=0的实数根;从函数的图象来看,零点就是函数f(x)的图象与x轴交点的横坐标.一些方程不涉及方程
Compulsory Part 3.1.1 states the root of the equation, the zero point of the function: Equation f (x) = 0 The image with the real root function y = f (x) and The x-axis has a common point The function y = f (x) has zeros, which shows that the zeros of the functions organically relate numbers and shapes, functions and equations from different angles. From a functional point of view, zeros make function values Is a real number of 0; from an equation point of view, zero is the real root of the corresponding equation f (x) = 0; from the function of the image point of view, the zero is the function of f (x) Some equations do not involve equations