What is the determinant of the matrix [[2, 1, 0], [1, 3, 2], [0, 2, 1]]?
Correct answer: A. -3
- A. -3
- B. -1
- C. 3
- D. 5
Explanation
Expanding along the first row gives 2(3 × 1 - 2 × 2) - 1(1 × 1 - 2 × 0) = -3. Therefore, the determinant is -3.
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