Compute the determinants in Exercises 1-2 by cofactor expansions. At each step, choose a row or column

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Compute the determinants in Exercises 1-2 by cofactor expansions. At each step, choose a row or column that involves the least amount of computation.
1.
Compute the determinants in Exercises 1-2 by cofactor expansions. At

2.

Compute the determinants in Exercises 1-2 by cofactor expansions. At
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