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考研
设A为m×n阶矩阵,C为n阶矩阵,B=AC,且r(A)=r,r(B)=r1,则( ).
设A为m×n阶矩阵,C为n阶矩阵,B=AC,且r(A)=r,r(B)=r1,则( ).
admin
2022-11-03
260
问题
设A为m×n阶矩阵,C为n阶矩阵,B=AC,且r(A)=r,r(B)=r
1
,则( ).
选项
A、r>r
1
B、r<r
1
C、r≥r
1
D、r与r
1
的关系依矩阵C的情况而定
答案
C
解析
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0
考研数学三
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