线性代数练习题5
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线性代数练习题5
答:
a11A21=-a11a12a33+a11a13a32
a12A22=a11a12a33-a12a13a31
a13A23=-a11a13a32+a12a13a31
相加得0
a11A21=-a11a12a33+a11a13a32
a12A22=a11a12a33-a12a13a31
a13A23=-a11a13a32+a12a13a31
相加得0