矩阵作业题,求解答!

要详细过程,谢谢

第1个回答  2024-04-17
A^2 - A - 3I = O, A^2 - A - 2I = I, (A+I)(A-2I) = I, (A+I)^(-1) = A-2I , 选 B;
A^2 - 2A - I = O, A^2 - 2A - 3I = -2I, (A+I)(A-3I) = -2I,
(A+I)^(-1) = (1/2)(3I-A), 选 D
相似回答