由已知,A,B 的特征值相同,为:1/2,1/3,1/4
所以 |A|=|B| = (1/2)*(1/3)*(1/4) = 1/24.
行列式
B^-1 E
0 A^-1
= |B^-1| |A^-1| = |B|^-1|A|^-1 = 24*24 = 576.