求下列方阵逆矩阵1 2 32 2 13 4 3
问题描述：
求下列方阵逆矩阵
1 2 3
2 2 1
3 4 3
答
1 2 3 1 2 3 1 2 3
2 2 1 = 0 -2 -5 = 0 -2 -5 =1*（-2）*（-1）=2
3 4 3 0 -2 -6 0 0 -1
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答
1 2 3 1 0 02 2 1 0 1 03 4 3 0 0 1r2-2r1.r3-3r11 2 3 1 0 00 -2 -5 -2 1 00 -2 -6 -3 0 1r1+r2,r3-r21 0 -2 -1 1 00 -2 -5 -2 1 00 0 -1 -1 -1 1r1-2r3,r2-5r31 0 0 1 3 -20 -2 0 3 6 -50 0 -1 -1 -1 1(-1/2)r2,(-...