Matrix Mastery
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Questions and Answers

What is the identity matrix?

  • A matrix with all diagonal elements equal to 1 and non-diagonal elements equal to 0 (correct)
  • A matrix with all elements equal to 0
  • A matrix with all diagonal elements equal to 0 and non-diagonal elements equal to 1
  • A matrix with all elements equal to 1

    • What is the determinant of a 2x2 matrix [a, b; c, d]?

  • a^2 - b^2 + c^2 - d^2
  • a + b + c + d
  • a^2 + b^2 + c^2 + d^2
  • ad - bc (correct)

    • What is the result of multiplying a 3x2 matrix by a 2x4 matrix?

  • A 3x4 matrix (correct)
  • A 2x2 matrix
  • A 3x2 matrix
  • A 2x3 matrix

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