What is the determinant of the matrix ?

Answer and explanation

Correct answer: A.

  1. Step 1: The determinant of a matrix is .
  2. Step 2: Compute .
  3. Step 3: Compute .
  4. Step 4: Subtract: .
Answer
.
Why not the others: '' computes , missing the negative sign of ; '' only computes the main diagonal product; '' computes .

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