|1+x 1 1 1 ||1 1-x 1 1 ||1 1 1+y 1 ||1 1 1 1-y|
1个回答
初等变换,每行分别减去1
然后对角相乘,得-(x^2+y^2)
相关问题
计算下列行列式 1+X 1 1 1 1 1+X 1 1 1 1 1+Y 1 1 1 1 1+Y
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