Which of the following statements are true?
A. A square matrix A is said to be non-singular If |A| = 0
B. A square matrix A is invertible if and only if A is non-singular matrix.
C. If elements of a row are multiplied with cofactors of any other row, then their sum is zero.
D. A is square matrix of order 3 then |Adj.(A)| = |A|3
Choose the correct answer from the options given below
Answer & explanation
Correct answer: option 2
A. → false A is non singular if |A| ≠ 0
B. → true , C. → true
D. → false |Adj (A)| = |A|2