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<p>已知行列式<img alt="" src="https://learnfile.20230611.cn/learnAppQ
分类: 数学2 (军队文职)
发布时间: 2023-11-03 09:29
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已知行列式
,则A11+A21+A31+A41等于:
A.a-b
C.a-d
D.b-d
正确答案是B
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