Find the indicated sum or difference, if it is defined.
-$$\left[ \begin{array} { l l }
5 & 4
\end{array} \right] + \left[ \begin{array} { r }
- 1 \
5
\end{array} \right]$$
A) $\left[ \begin{array} { l l } 4 & 9 \end{array} \right]$
B) not defined
C) $\left[ \begin{array} { l } 4 \ 9 \end{array} \right]$
D) $\left[ \begin{array} { r r } 5 & - 1 \ 4 & 5 \end{array} \right]$

Question

Find the indicated sum or difference, if it is defined.
-$$\left[ \begin{array} { l l } 
5 & 4
\end{array} \right] + \left[ \begin{array} { r } 
- 1 \
5
\end{array} \right]$$
A) $\left[ \begin{array} { l l } 4 & 9 \end{array} \right]$
B) not defined
C) $\left[ \begin{array} { l } 4 \ 9 \end{array} \right]$
D) $\left[ \begin{array} { r r } 5 & - 1 \ 4 & 5 \end{array} \right]$

Quizplus · Accepted Answer

The operation is not defined because the matrices have different dimensions: the first is 1x2 and the second is 2x1.

Find the Indicated Sum or Difference, If It Is Defined [54]+[−15]\left[ \begin{array} { l l } 5 & 4\end{array} \right] + \left[ \begin{array} { r } - 1 \\5\end{array} \right][5​4​]+[−15​]

Find the Indicated Sum or Difference, If It Is Defined $\left[ \begin{array} { l l } 5 & 4\end{array} \right] + \left[ \begin{array} { r } - 1 \\5\end{array} \right]$