• 2022-06-07
    设A, B, C均为n 阶方阵, 则下列结论一定正确的是[ ].
    A: 若 A + B = A + C, 则 B = C.
    B: 若 AB = AC, 则 B = C.
    C: 若 AB = AC 而且 A ¹ O, 则 B = C.
    D: 若 AB = AC 而且 A 与单位矩阵等价, 则 B = C.
    E: A(BC) = (AC)B.