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设－2是3阶矩阵A的一个特征值，则A2必有一个特征值为().

高老师2年前 (2024-03-26)概率论与数理统计（经管类）(04183)9

设－2是3阶矩阵A的一个特征值，则A2必有一个特征值为().

A.－8

B.－4

C.4

D.8

正确答案是C

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