2请解答图中计算题：请写出主要步骤

2个回答

系数矩阵 =2 1 -1 -1 11 -1 1 1 -23 3 -3 -3 44 5 -5 -5 7r1+r2,r3+3r2,r4+5r23 0 0 0 -11 -1 1 1 -26 0 0 0 -29 0 0 0 -3r3-2r1,r4-3r1,r1*(1/3)1 0 0 0 -1/31 -1 1 1 -20 0 0 0 00 0 0 0 0r2-r1,r2*(-1)1 0 0 0 -1...