A matrix of order of 3 × 1 whose elements a_ij are given by a_ij = (2i + j), is :

1. $\begin{bmatrix} 3 & 5 & 7 \end{bmatrix}$

2. $\begin{bmatrix} 3 \ 5 \ 7 \end{bmatrix}$

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

4. $\begin{bmatrix} 2 \ 4 \ 6 \end{bmatrix}$

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

A 2 × 2 matrix whose elements are given by a_ij = $\dfrac{(i + 2j)^2}{2}$ is:

1. $\begin{bmatrix} \dfrac{3}{2} & \dfrac{5}{2} \ \space & \space \ 8 & 18 \end{bmatrix}$

2. $\begin{bmatrix} \dfrac{5}{2} & \dfrac{7}{2} \ \space & \space \ 8 & 18 \end{bmatrix}$

3. $\begin{bmatrix} \dfrac{9}{2} & \dfrac{15}{2} \ \space & \space \ 8 & 18 \end{bmatrix}$

4. $\begin{bmatrix} \dfrac{9}{2} & \dfrac{25}{2} \ \space & \space \ 8 & 18 \end{bmatrix}$

If $\begin{bmatrix} 5 & 3 \ x & 7 \end{bmatrix} = \begin{bmatrix} y & z \ 1 & 7 \end{bmatrix}$, then the value of (x + y + z) is:

1. 9

2. 8

3. 11

4. 10