用到的行列式的性质:设A,B是n阶方阵,则
1.|A^T| = |A|.
2.|AB| = |A||B|.
3.|kA| = k^n|A|
所以有
||A|A^2A^T| = |A|^3|A|^2|A^T| = |A|^6 = (-2)^6 = 64.
用到的行列式的性质:设A,B是n阶方阵,则
1.|A^T| = |A|.
2.|AB| = |A||B|.
3.|kA| = k^n|A|
所以有
||A|A^2A^T| = |A|^3|A|^2|A^T| = |A|^6 = (-2)^6 = 64.