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我在上关于《极大值与极小值》的新课时,讲解课本例2求y=13x3-4x+13的极值时是运用求函数极值的方法讲得很透,由于时间不够该例题的图象没有讲.在学习后的关于三次函数的练习中以及考试中发现许多学生掌握得不好,通过和学生进行交流知道几乎没有学生对该例题的图象进行过关注.在高三数学教学中发现许多关于导数的例题和习题若借助该例题的图象去讲、去分析会让学生掌握得更容易.于是我决定在第二轮复习中运用一节课的时间师生一起研讨三次函数的图象以及由图象得到三次函数的性质.一、案例描述师:把苏教版1—1翻到第78页.
When I went to the new course on “maximum and minimum”, I explained the extremum of textbook case 2 for y = 13x3-4x + 13 by using the method of finding the extremum of function. Because of lack of time, The examples of the image did not say.After learning about the cubic function of the practice and examinations found that many students do not master well, through the exchange and students know that few students concerned about the image of the example.Secondary mathematics In teaching, I found many examples and exercises about derivatives. To analyze with the help of the image of the example, it would be easier for students to master it. So I decided to use the time in the second round of review to discuss three times with teachers and students The image of the function and the nature of the cubic function obtained from the image I. Case Description Teacher: Turn Sujiao version 1-1 to page 78.