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    				| 1. | 
                                    Find the adjoint of the given matrix and verify in ach case that `A.(adj A)=(adj A).A=|A|.I.` `[(4,5,3),(1,0,6),(2,7,9)]` | 
                            
| Answer» `[(-42,-24,30),(3,30,-21),(7,-18,-5)]` | |