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求下列方阵逆矩阵
1 2 3
2 2 1
3 4 3
人气:465 ℃ 时间:2020-05-14 22:00:34
解答
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,(-...
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