Now we start to use the determinant.
- Understanding the cofactor formula allows us to show that A^-1 = (1/detA)C^T, where C is the matrix of cofactors of A.
- Combining this formula with the equation x = A^-1*b gives us Cramer's rule for solving Ax = b.
- Also, the absolute value of the determinant gives the volume of a box.
内容
第20讲的主要内容是在前两课的基础上，讲解行列式的应用。
那么如何应用行列式呢？
- 用于求解A的逆
- 克拉默法则求解Ax=b的解
- |detA|的几何意义：求解面积与体积
@安然Anifacc
2016-12-13 08:20:12
