Write the minors and cofactors of each element of the first column of the following matrices and...

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Write the minors and cofactors of each element of the first column of the following matrices and hence evaluate the determinant in each case:
\[
A=\left[\begin{array}{lll}
0 & 2 & 6 \\
1 & 5 & 0 \\
3 & 7 & 1
\end{array}\right]
\]
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