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
问题描述：
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
答
c1+(x-5)c2,c4-(w-5)c3x-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)]...