Evaluate the determinant \( \begin{vmatrix} 1 & 0 & 0 \\ 0 & 1 &

Practice Questions

Q1
Evaluate the determinant \( \begin{vmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{vmatrix} \)
  1. 0
  2. 1
  3. 2
  4. 3

Questions & Step-by-Step Solutions

Evaluate the determinant \( \begin{vmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{vmatrix} \)
  • Step 1: Identify the matrix given in the question. It is a 3x3 matrix: [[1, 0, 0], [0, 1, 0], [0, 0, 1]].
  • Step 2: Recognize that this matrix is called the identity matrix.
  • Step 3: Understand that the determinant of the identity matrix is always 1, regardless of its size.
  • Step 4: Conclude that the determinant of the given matrix is 1.
  • Determinant of a Matrix – The determinant is a scalar value that can be computed from the elements of a square matrix and provides important properties about the matrix, such as whether it is invertible.
  • Identity Matrix – The identity matrix is a square matrix with ones on the diagonal and zeros elsewhere, and its determinant is always 1.
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