“线性方程组”这一章的内容包括:二元线性方程组,行列式的概念,二阶、三阶行列式的对角线展开法,行列式的性质,行列式的按一行(或一列)降阶展开法,三元线性方程组,齐次线性方程组等。要掌握这些内容,一方面要一堂课一堂课地逐步积累知识,掌握要点,另一方面要善于总结,抓住关键,使学生能掌握住一条知识线索。 The “Linear Equations” section includes the following: binary linear equations, the concept of determinants, the diagonal expansion of second-order and third-order determinants, the nature of determinants, and the determinant of one line (or column) ) Reduced-order expansion method, ternary linear equations, homogeneous linear equations, etc. To master these contents, one should gradually acquire knowledge and master the main points in one class, and on the other hand, it should be good at summing up and grasping the key so that students can grasp a knowledge clue.