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江苏新海连市新海中学1982年高考中,有一班(49人)获得数学100分以上的有33人,且全班平均分数达到98.2分,这样好的成绩的取得并非偶然,从我在该校听到的一堂数学课,看看他们是如何提高课堂教学质量的情况,供参考。课题:行列式的应用。内容一、复习行列式性质及有关概念。二、应用举例。例1.应用行列式性质分解因式:a~3+b~3+c~3-3abc。(由学生考虑回答a~3+b~3+c~3-3abc是哪个行列式的展开式?) 解:a~3+b~3+C~3-3abc=
In the 1982 college entrance examination in Xinhai Middle School, Xinhai City, Jiangsu Province, there were 33 students with a score of 100 or more in mathematics (49), and the average score of the whole class was 98.2. It was no accident that such a good score was achieved. From my school Listen to a math lesson and see how they can improve the quality of classroom teaching for your reference. Topic: Application of determinants. Contents I. Review the nature of the determinant and related concepts. Second, application examples. Example 1. Apply deterministic nature decomposition factor: a~3+b~3+c~3-3abc. (The student should consider answering the determinant expansion of a~3+b~3+c~3-3abc?) Solution: a~3+b~3+C~3-3abc=