Question

The order of the single matrix obtained from
$\left[\begin{array}{cc}1& -1\\ 0& 2\\ 2& 3\end{array}\right]\left\{\begin{array}{c}\left[\begin{array}{ccc}-1& 0& 2\\ 2& 0& 1\end{array}\right]-\left[\begin{array}{ccc}0& 1& 23\\ 1& 0& 21\end{array}\right]\end{array}\right\}$ is

• A. $2\times 3$
• B. $2\times 2$
• C. $3\times 2$
• D. $3\times 3$

Answer 1

Answer: (D)

When a $3\times 2$ matrix is post multiplied by a$2\times 3$ matrix, the product is a $3\times 3$ matrix.