教材中有许多非常典型的题目,这些题目或体现重要思想方法,或易于变形推广,具有非常广泛的应用.但由于教材中的习题多数比较简单,同学们往往不够重视,做完一道题目之后,没有及时总结反思.其实如果能对课本上的习题进行类比、变形与推广,这对培养同学们应变、探索能力,启迪发散创新思维都大有裨益.下面通过具体例子加以说明.人教版高中数学选修4-5不等式选讲P41第4题是: There are many typical topics in the textbook, these topics or reflect the important ideas and methods, or easy to deformation and promotion, has a very wide range of applications.But because of the textbook exercises are relatively simple, students often do not pay enough attention to finish a topic, In fact, if the textbook exercises analogy, deformation and promotion, which students develop strain, explore the ability to inspire and divergent innovative thinking are of great benefit to the following through the specific examples to illustrate. PEP Mathematics Elective 4-5 Inequality Speaking P41 Question 4 is: