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Write mitros and cofactros of the elemen...

Write mitros and cofactros of the elements of the following determinants:
`|{:(1,0,0),(0,1,0),(0,0,1):}|`
(ii) `|{:(1,0,4),(3,5,-1),(0,1,2):}|`

Text Solution

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The correct Answer is:
`M_(11)=-40`, `M_(12)=6`, `M_(13)=3`
`M_(21)=-4`, `M_(22)=2`, `M_(23)=1`
`M_(31)=-20`, `M_(32)=-13`, `M_(33)=5`;
`A_(11)=11`, `A_(12)=-6`, `A_(13)=3`
`A_(21)=4`, `A_(22)=2`, `A_(23)=-1`
`A_(31)=-20`, `A_(32)=13`, `A_(33)=5`; `23`
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