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构造法,顾名思义即在原有基础上,借助一些辅助手法利用已知条件,将一些原本未知的条件转变成已知,进而求解。构造法作为一种比较特殊的解题方法,有一定的运用技巧,与以往的解题思路有所不同,我们要侧重寻找数量关系从而有效解决问题。一、函数构造法在用复合函数求导时要经过如下几个步骤:其一,分清复合函数的复合关系,选好中间变量;其二,运用复合函数求导法则求复合函数的导数,注意分清每次是哪个变量对哪个变量求导数;其三,根据基本函数的
Construction method, as the name suggests, that is based on the original, with some assistive techniques to use known conditions, some of the original unknown conditions into known, and then solved. Construction method as a relatively special problem-solving method, there are certain skills, and the previous problem-solving ideas are different, we should focus on finding the number of relations in order to effectively solve the problem. First, the function construction method in the use of composite functions to guide the following steps: First, distinguish the complex relationship between complex functions, select the intermediate variables; Second, the use of complex functions to find the derivative of the derivative of the derivative of the derivative function, pay attention to To distinguish which variable is which variable to find the derivative? Third, according to the basic function