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Questions and Answers
What is the identity matrix?
What is the identity matrix?
- A matrix with all elements as 1
- A square matrix with all diagonal elements as 1 and all other elements as 0 (correct)
- A matrix with all elements as 0
- A square matrix with all elements as 1
What is the determinant of a 2x2 matrix [a, b; c, d]?
What is the determinant of a 2x2 matrix [a, b; c, d]?
- a^2 + b^2 + c^2 + d^2
- a + b + c + d
- ad - bc (correct)
- 2(ad + bc)
What is the result of matrix multiplication AB, if A is a 3x2 matrix and B is a 2x4 matrix?
What is the result of matrix multiplication AB, if A is a 3x2 matrix and B is a 2x4 matrix?
- A 2x2 matrix
- A 3x4 matrix (correct)
- A 3x2 matrix
- A 2x4 matrix
