专题解说函数关系是指某个变化过程中两个变量具有某种对应关系.方程是由已知量和未知量构成的矛盾的统一体,它是从已知探索未知的桥梁.从分析问题的数量关系入手,抓住函数关系或等量关系运用数学语言将函数或等量关系转化为函数式或方程与未知量的限制条件,再通过利用函数的性 Thematic explanations of functional relationships refer to a certain correspondence between two variables in a process of change. Equations are the contradictory unity of known and unknown quantities. It is a bridge from the known to explore the unknown. From the analysis of the problem Starting with a quantitative relationship, grasping a functional relationship or equivalent relationship, using mathematical language to convert a function or equivalent relationship into a functional or equation and unknown limit condition, and then by using the property of the function