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.
內(nèi)容
第20講的主要內(nèi)容是在前兩課的基礎(chǔ)上鳍烁，講解行列式的應(yīng)用辞居。
那么如何應(yīng)用行列式呢焕盟？
- 用于求解A的逆
- 克拉默法則求解Ax=b的解
- |detA|的幾何意義：求解面積與體積
@安然Anifacc
2016-12-13 08:20:12
