四阶的,可以硬求(展开成24项),也可以化简求。行列式=|(1,2,3,4)(0,1,1,-3)(0,2,-2,-2)(0,-1,-1,-1)| 【r2-r1、r3-r1、r4-r1】=|(1,1,-3)(2,-2,-2)(-1,-1,-1)| 【按c1展开】=|(1,2,-2)(2,0,0)(-1,-2,-2)| 【c2+c1、c3+c1】=2*|(2,-2)(2,2)| 【按r2展开,提出r2的公因子】=2*(4+4)=16楼上明显做错了!