If A is a non-singular matrix of order 3, what is |adj A| if |A| = 5?
If A is a non-singular matrix of order 3, what is |adj A| if |A| = 5?
- A. 5
- B. 25
- C. 125
- D. 1/5
Answer: B) 25
Explanation: For an n×n matrix, |adj A| = |A|^(n-1). Here n=3, so |adj A| = 5² = 25.
0 Answers
Log in to post your own answer or join the discussion.
No comments yet — start the discussion.