NDA 2026
- Exam
- NDA
- Year
- 2026
- Subject
- Mathematics
- Chapter
- Determinants
NDA 2026 · Mathematics · Determinants
If A is a square matrix such that |A|=-2 , then |AA^ T | , where A^...
If is a square matrix such that , then , where is the transpose of , is equal to
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
Using the property of determinants, .
Therefore, .
Since the determinant of a matrix is equal to the determinant of its transpose, .
Substituting this into the equation gives .
Given , we get .
Answer:
Therefore, .
Since the determinant of a matrix is equal to the determinant of its transpose, .
Substituting this into the equation gives .
Given , we get .
Answer: