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“打比方”是一种常见的修辞手法,能突出两种事物之间相似的性状特征,具有化抽象为具体,变繁杂为简洁的功能,是突破某些高中数学难题的有效利器.含量词双变量双函数题是近年高中数学的一个热点题,由于是两个函数,两个变量,且含有量词,使得数学含义深刻,变化多样,而题目叙述的文字又很相近,使人感到扑朔迷离,以致于我们不少学生对此类问题题意混淆不清,解题不知所措.对此有何破解之道呢?1含量词双变量双函数的不等式问题
As a common rhetorical device, “striking likeness” can emphasize the similar traits between two kinds of things. It has the function of abstraction from concrete to complexity and conciseness, and is an effective weapon to break through some high school math problems. Bilingual variable double-function question words is a hot topic in high school mathematics in recent years. Because it is two functions, two variables and contains quantifiers, the meaning of mathematics is profound and varied, and the topics are very similar Confusing and confusing, so many of our students confused confusion on such issues, problem-solving overwhelmed. What is the solution to this? Bivariate two-variable inequality of double-variable inequality