论文部分内容阅读
导数问题中,经常出现曲线交点或方程解的个数问题,对这类高次和超越方程,我们常常会解不下去而拿不到分.数形结合思想的正确运用,能打开我们的解题思路,优化和丰富解题的方法和技巧,大大提高了我们运用数学思想方法去分析、解决数学问题与实际问题的能力.但如果不能合理运用,就可能导致错解.现举以下三例,供大家参考.一、不注意定义域的限制导致错误
In the derivative problem, we often encounter the problem of the intersection of curves or the number of solutions. For such higher-order and transcendental equations, we often can not solve the problem but can not get the points. Using the correct combination of the numerical forms can open our solution The ideas, methods and techniques of optimizing and enriching problems have greatly enhanced our ability to analyze and solve math problems and practical problems by using mathematical thinking methods. However, if we can not make rational use of them, it may lead to misunderstanding. , For your reference. First, do not pay attention to the definition of domain restrictions lead to errors