Let M be a 2 x 2 symmetric matrix with integer entries. Then M is invertible if (a)The first column of M is the transpose of the second row of M (b)The second row of Mis the transpose of the first olumn of M (c) M is a diagonal matrix with non-zero entries in the main diagonal (d)The product of entries in the main diagonal of Mis not the square of an integer
A. the first column of M is the transpose of the second row of M.
B. the second row of M is the transpose of the first column of M.
C. M is a diagonal matrix with non-zero entries in the main diagonal.
D. the product of entries in the main diagonal of M is not the square of an integer.
