（填空题）
__________
三阶行列式
的值为__________
有方程组
只有唯一解，求A的取值范围（ ）
有四阶行列式5THKX.png)
,求54QNWI.png)
的值__________
n阶行列式
的值__________
（填空题）
__________
题目
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关于特征值和特征向量的若干结论
因为矩阵的特征值中有一个0，所以矩阵的行列式的值为0，解得未知数
多做几道
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