Question 25
Matrices and DeterminantsEvaluate |4 2 −1; 2 3 −1; −1 1 3| (determinant written row by row)
- A.25
- B.45
- C.15
- D.55
Show the answer and explanation
Answer: A (25)
Explanation
4(9 + 1) − 2(6 − 1) + (−1)(2 + 3) = 40 − 10 − 5 = 25.
Evaluate |4 2 −1; 2 3 −1; −1 1 3| (determinant written row by row)
Answer: A (25)
4(9 + 1) − 2(6 − 1) + (−1)(2 + 3) = 40 − 10 − 5 = 25.