0 1 z-4 -1 0 0 1 w-5 x-5 -1 0 0 1 y+3 -1 0 求行列式答案

0 1 z-4 -1 0 0 1 w-5 x-5 -1 0 0 1 y+3 -1 0 求行列式答案
0 1 z-4 -1 0 0 1 w-5 x-5 -1 0 0 1 y+3 -1 0 求行列式答案

0 1 z-4 -1 0 0 1 w-5 x-5 -1 0 0 1 y+3 -1 0 求行列式答案
c1+(x-5)c2,c4-(w-5)c3
x-5 1 z-4 -1-(w-5)(z-4)
0 0 1 0
0 -1 0 0
1+(x-5)(y+3) y+3 -1 w-5
按第2行展开,再按第3行展开
x-5 -1-(w-5)(z-4)
1+(x-5)(y+3) w-5
行列式 = (x-5)(w-5) + [1+(x-5)(y+3)][1+(w-5)(z-4)]

2/9,2/3,3