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近几年来,与解析几何有关的参数取值范围的问题经常出现在高考考试中,这类问题不仅涉及知识面广,综合性大,应用性强,而且情景新颖,能很好地考查学生的创新能力和潜在的数学素质,是历年来高考命题的热点和重点.学生在处理这类问题时,往往抓不住问题关键,无法有效地解答.这类问题求解的关键在于根据题意,构造相关的不等式,然后求出不等式的解.那么,如何构造不等式呢?本文介绍几种常见的方法:
In recent years, the problem of parameter value range related to analytic geometry often appears in college entrance examination, which not only involves a wide range of knowledge, comprehensiveness, strong applicability, but also novel situation, which can well examine students’ Innovation ability and potential mathematical quality, is the hot topic and focus of college entrance examination proposition over the years.University students often can not grasp the key issues, can not effectively answer the key.The solution of these problems lies in the problem-solving, structure Related inequalities, and then find the solution of inequality.So, how to construct inequalities? This article describes several common methods: