一、目标指引函数与方程是两个不同的概念,但它们之间有着密切的联系.方程f(x)=0的解就是函数y=f(x)的图像与x轴的交点的横坐标,函数y=f(x)也可以看作二元方程f(x)-y=0通过方程进行研究.函数思想就是要用运动变化的观点,分析和研究具体问题中的数量关系,通过函数的形式把这种数量 First, the target guide function and the equation are two different concepts, but there is a close relationship between them.The solution of the equation f (x) = 0 is the abscissa of the intersection of the image y = f (x) and the x axis , The function y = f (x) can also be considered as the binary equation f (x) -y = 0. The function idea is to analyze and study the quantitative relationship among the specific problems from the point of view of the change of movement, Put this number in the form