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If A is a 3xx3 matrix and absA=2, then which matrix is represented by Axx adjA? |
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Answer» SOLUTION :We have `AXX adjA=(Axx adjA)/(ABSA) XX absA` =`AxxA^-1xx2(because absA=2)` =`2I=2[[1,0,0],[0,1,0],[0,0,1]]=[[2,0,0],[0,2,0],[0,0,2]]` where `I=[[1,0,0],[0,1,0],[0,0,1]]` |
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