问题描述: (2,-1,-1,1,2;1,1,-2,1,4;4,-6,2,-2,4;3,6,-9,7,9)怎样化为行阶梯形矩阵 1个回答 分类:数学 2014-09-18 问题解答: 我来补答 3-2r1,r1-2r2,r4-3r20 -3 3 -1 -61 1 -2 1 40 -4 4 -4 00 3 -3 4 -3r3*(-1/4),r1+3r3,r4-3r30 0 0 2 -61 1 -2 1 40 1 -1 1 00 0 0 1 -3r1-2r40 0 0 0 01 1 -2 1 40 1 -1 1 00 0 0 1 -3交换行1 1 -2 1 40 1 -1 1 00 0 0 1 -30 0 0 0 0 展开全文阅读