选择题：12. (单选题)设A是n阶可逆矩阵，A.是A的伴随矩阵，则（）(本题2.0分) A、|A.|=|A

题目内容：

12. (单选题)设A是n阶可逆矩阵，A.是A的伴随矩阵，则（）(本题2.0分)
A、|A.|=|A|n-1
B、|A.|=|A|
C、|A.|=|A|n
D、|A.|=|A-1|

参考答案：

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