Question

Matrix [1 2] $\left( \begin{bmatrix}

• 2 & 5 \ 3 & 2 \end{bmatrix}\begin{bmatrix} 1 \ 2 \end{bmatrix} \right)$ is equal to-

• A. [1 2 2]
• B. [2 3]
• C. [2 2]
• D. None of these

Answer 1

Answer: (C)

$2 2$

Answer 2

We have

[1 2] $\left( \begin{bmatrix}

• 2 & 5 \ 3 & 2 \end{bmatrix}\begin{bmatrix} 1 \ 2 \end{bmatrix} \right)$

= [1 2] $\begin{bmatrix}

• 2 + 10 \ 3 + 4 \end{bmatrix}$= [1 2]$\begin{bmatrix} 8 \ 7 \end{bmatrix}$

= [8 + 14] = [2 2]