计算此行列式的值
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计算此行列式的值
按某行或者某列展开即可,
D=a1*[a4*(a2*a3 -b2*b3)] - b4 *[b1*(a2*a3 -b2*b3)]
=a1*a2*a3*a4 -a1*b2*b3*a4 - b1*a2*a3*b4 +b1*b2*b3*b4
计算此行列式的值
按某行或者某列展开即可,
D=a1*[a4*(a2*a3 -b2*b3)] - b4 *[b1*(a2*a3 -b2*b3)]
=a1*a2*a3*a4 -a1*b2*b3*a4 - b1*a2*a3*b4 +b1*b2*b3*b4