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AX - 2X = A, 则 (A-2E)X = A, X = (A-2E)^(-1)A
[A-2E, A] =
[-1 -1 0 1 -1 0]
[ 0 -1 -1 0 1 -1]
[-1 0 -1 -1 0 1]
初等行变换为
[ 1 1 0 -1 1 0]
[ 0 1 1 0 -1 1]
[ 0 1 -1 -2 1 1]
初等行变换为
[ 1 0 -1 -1 2 -1]
[ 0 1 1 0 -1 1]
[ 0 0 -2 -2 2 0]
初等行变换为
[ 1 0 0 0 1 -1]
[ 0 1 0 -1 0 1]
[ 0 0 1 1 -1 0]
X = (A-2E)^(-1)A =
[ 0 1 -1]
[-1 0 1]
[ 1 -1 0]
[A-2E, A] =
[-1 -1 0 1 -1 0]
[ 0 -1 -1 0 1 -1]
[-1 0 -1 -1 0 1]
初等行变换为
[ 1 1 0 -1 1 0]
[ 0 1 1 0 -1 1]
[ 0 1 -1 -2 1 1]
初等行变换为
[ 1 0 -1 -1 2 -1]
[ 0 1 1 0 -1 1]
[ 0 0 -2 -2 2 0]
初等行变换为
[ 1 0 0 0 1 -1]
[ 0 1 0 -1 0 1]
[ 0 0 1 1 -1 0]
X = (A-2E)^(-1)A =
[ 0 1 -1]
[-1 0 1]
[ 1 -1 0]
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展开全部
x=A/A-2,,,,,,A等于多少带进去就行,采纳
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