linear algebra
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linear algebra
linear algebra
linear algebra
27
因为|A|=a11·a22·.·ann≠0
所以
A可逆
且
A^(-1)=
[ a11^(-1) 0 .0
0 a22^(-1).0
.
0 0.ann^(-1)]
29.
a) 如果A有一行为0行,那么
|A|=0,所以A不可逆;
b)如果A有一列全为0,那么
|A|=0,所以A不可逆.
27
因为|A|=a11·a22·.....·ann≠0
所以
A可逆
且
A^(-1)=
[ a11^(-1) 0 ......0
0 a22^(-1)....0
.......................
0 0......ann^(-1)]
29.
a) 如果A有...
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27
因为|A|=a11·a22·.....·ann≠0
所以
A可逆
且
A^(-1)=
[ a11^(-1) 0 ......0
0 a22^(-1)....0
.......................
0 0......ann^(-1)]
29.
a) 如果A有一行为0行,那么
|A|=0,所以A不可逆;
b)如果A有一列全为0,那么
|A|=0,所以A不可逆。
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linear algebra
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