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If A=[[1 ,3 ,3],[ 1, 4 ,3],[ 1, 3, 4]],t...

If `A=[[1 ,3 ,3],[ 1, 4 ,3],[ 1, 3, 4]]`,then verify that`A a d j A = |A|I`. Also find `A^(-1)`.

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If `A=|[1 ,3 ,3],[ 1, 4 ,3],[ 1, 3, 4]|`
`|A|= 1(16-9)-3(4-3)+3(4-3)`
`=7-3-3=1`
`adj (A)=[[7,-3,-3],[-1,1,0],[-1,0,1]]`
...
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