Question: (a) Evaluate each determinant, and (b) Use the determinant to decide whether each matrix has an inverse. Use technology in Problems. 1. 2. 3. 4.

(a) Evaluate each determinant, and

(b) Use the determinant to decide whether each matrix has an inverse. Use technology in Problems.

1.

1. 2. 4.

2.

-1 -2

3.

1. 2. 4. -1 -2

4.

1. 2. 4. -1 -2

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