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最佳答案:#includeint main(){x05int a[3][4]={{1,2,3,1},{2,7,5,6},{1,4,9,-3}};x05int i,j;x0
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最佳答案:增广矩阵 =2 -1 -1 1 21 1 -2 1 44 -6 2 -2 43 6 -9 7 9r4-r1-r2,r3-2r1,r1-2r20 -3 3 -1