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以下结论中哪一个是正确的?()

单选题
2022-05-22 09:11
A、若方阵A的行列式│A│=0,则A=0
B、若A2=0,则A=0
C、若A为对称阵,则A2也是对称阵
D、D.对任意的同阶方阵A、B有(A+(A-B.=A2-B2
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正确答案
C

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