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一、知识要点和学习要求1.理解集合、子集、交集、并集、补集的概念;了解空集、全集和属于、包含、相等关系的意义;掌握有关术语和符号,能正确地表示集合。2.掌握绝对值不等式和一元二次不等式的解法,并能就其解集的几何意义进行解释。二、学习指导1.集合的元素具有确定性、互异性、无序性等三性,即给定一个集合,可确定任一元素或者属于或者不属于这个集合;集合的元素两两互异并且无序。这些性质是解题的依据,应牢固掌握。
I. Knowledge points and learning requirements 1. Understand concepts of sets, subsets, intersections, unions, and complements; understand the meaning of empty sets, corpora, and belongings, inclusions, and equivalences; master relevant terms and symbols and can correctly represent set. 2. Master the solutions of absolute value inequalities and unary quadratic inequalities and explain the geometric meaning of their solution sets. Second, learning guidance 1. The elements of the set have certainty, heterogeneity, disorder and other three properties, that is, given a set, you can determine whether any element belongs to or does not belong to this set; the elements of the set are mutually different and Disorderly. These properties are the basis for problem solving and should be firmly mastered.