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14. (A, b) =
[1 1 1 1]
[0 2 2 1]
[1 -1 0 2]
初等行变换为
[1 1 1 1]
[0 2 2 1]
[0 -2 -1 1]
初等行变换为
[1 1 1 1]
[0 2 2 1]
[0 0 1 2]
初等行变换为
[1 1 0 -1]
[0 2 0 -3]
[0 0 1 2]
初等行变换为
[1 0 0 1/2]
[0 1 0 -3/2]
[0 0 1 2]
x = (1/2. -3/2, 2)^T
[1 1 1 1]
[0 2 2 1]
[1 -1 0 2]
初等行变换为
[1 1 1 1]
[0 2 2 1]
[0 -2 -1 1]
初等行变换为
[1 1 1 1]
[0 2 2 1]
[0 0 1 2]
初等行变换为
[1 1 0 -1]
[0 2 0 -3]
[0 0 1 2]
初等行变换为
[1 0 0 1/2]
[0 1 0 -3/2]
[0 0 1 2]
x = (1/2. -3/2, 2)^T
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