Write the minors and cofactors of each element of the first column of the following matrices and hence evaluate the determinant in each case: `A=[0 2 6 1 5 0 3 7 1]` (ii) `A=[a hgh bfgfc]` (ii) `A=[2-1\ \ 0-3\ 0\ \ 1 1\ 1-1\ 2\ \ -1\ \ \ 5\ \ \ \ \ \ \ 1\ \ \ -2\ \ \ \ \ \ 1\ \ \ \ \ \ 0]`

Explanation

`A=[(0,2, 6),( 1,5, 0),( 3, 7, 1)]`

`M_(11)=5-7xx0=5`

`M_(21)=2-7xx6=-40`

`M_(31)=2xx0-5xx6=-30`

`C_(11)=(-1)^2 M_(11)=5`

`C_(21)=(-1)^3 M_(21)=40`

`C_(31)=(-1)^4 M_(31)=-30`

`|A|= a_(11) c_(11)+a_(21) c_(21)+a_(31) c_(31)`

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