Question: 106
(Choose 1 answer)
(See picture)
A. (i) only
B. (ii) only
C. None of the other choices is correct
D. (iii) only
Let A be a square matrix. Denote by Aij the matrix obtained from A by deleting its ith row and jth column.
Which of the following statement is true?
(i) The (i,j)-cofactor of the matrix A is Aij
(ii) The (i,j)-cofactor of the matrix A is (-1)+ det(Aij)
(iii) The (i,j)-cofactor of the matrix A is (-1)+j Aij
