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设矩阵A=[1 1 1 -1 3 1 1 -1 1]的三个特征值分别为λ1,λ2,λ3,则λ1+λ2+λ3 = ( )

多选题
2021-09-03 17:02
A、4
B、5
C、6
D、7
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正确答案
B@#@B

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