图中第14和16题,
3个回答

(α1,α2,α3,β1,β2,β3,α)=

1 1 1 1 0 0 2

1 2 2 0 1 0 3

1 -1 0 0 0 1 -1

r2-r1,r3-r1

1 1 1 1 0 0 2

0 1 1 -1 1 0 1

0 -2 -1 -1 0 1 -3

r1-r2,r3+2r2

1 0 0 2 -1 0 1

0 1 1 -1 1 0 1

0 0 1 -3 2 1 -1

r2-r3

1 0 0 2 -1 0 1

0 1 0 2 -1 -1 2

0 0 1 -3 2 1 -1

(1) C=

2 -1 0

2 -1 -1

-3 2 1

(2) x=(1,2,-1)^T