The matrix, A = $\begin{bmatrix} 3 & 4 & -8 \ 2 & 0 & -2 \ 1 & 7 & -9 \end{bmatrix}$, then the value of a₂₃ is:

1. 2

2. -8

3. -9

4. -2

The matrix, A = $\begin{bmatrix} 4 & 0 & 0 \ 0 & 3 & 0 \ 0 & 0 & -7 \end{bmatrix}$ is a:

1. Rectangular matrix

2. Column matrix

3. Diagonal matrix

4. Identity matrix

A matrix of order 3 × 2 whose elements a_ij are given by a_ij = (i + j), is:

1. $\begin{bmatrix} 2 & 3 & 4 \ 3 & 4 & 5 \end{bmatrix}$

2. $\begin{bmatrix} 2 & 3 & 4 \ 4 & 5 & 6 \end{bmatrix}$

3. $\begin{bmatrix} 2 & 3 \ 3 & 4 \ 4 & 5 \end{bmatrix}$

4. $\begin{bmatrix} 2 & 3 \ 3 & 4 \ 5 & 6 \end{bmatrix}$

If a matrix has 12 elements, then the total number of possible orders it can have is:

1. 4

2. 6

3. 8

4. cannot be determined