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[主观题]
设A是4X3矩阵,B是3X4的非零矩阵,且满足AB=O;其中则( ).A.当t≠6时,必有r(B)=1B.当t=6时,必有r(B
设A是4X3矩阵,B是3X4的非零矩阵,且满足AB=O;其中则().A.当t≠6时,必有r(B)=1B.当t=6时,必有r(B
设A是4X3矩阵,B是3X4的非零矩阵,且满足AB=O;其中则().
A.当t≠6时,必有r(B)=1
B.当t=6时,必有r(B)=2
C.当t≠6时,必有r(B)=2
D.当t=6时,必有r(B)=1
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