Perform the row operation(s) on the given augmented matrix.
-$$\begin{array} { l }
\mathrm { R } _ { 1 } = \frac { 1 } { 2 } \mathrm { r } 1 \
{ \left[ \begin{array} { r r | r }
2 & - 2 & - 4 \
4 & 2 & - 5
\end{array} \right] }
\end{array}$$
A) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 2 & 1 & - \frac { 5 } { 2 } \end{array} \right]$

B) $\left[ \begin{array} { r r | r } 1 & - 1 & - 4 \ 4 & 2 & - 5 \end{array} \right]$

C) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 5 & 1 & - 7 \end{array} \right]$

D) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 4 & 2 & - 5 \end{array} \right]$

Question

Perform the row operation(s) on the given augmented matrix.
-$$\begin{array} { l } 
\mathrm { R } _ { 1 } = \frac { 1 } { 2 } \mathrm { r } 1 \
{ \left[ \begin{array} { r r | r } 
2 & - 2 & - 4 \
4 & 2 & - 5
\end{array} \right] }
\end{array}$$
A) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 2 & 1 & - \frac { 5 } { 2 } \end{array} \right]$

B) $\left[ \begin{array} { r r | r } 1 & - 1 & - 4 \ 4 & 2 & - 5 \end{array} \right]$

C) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 5 & 1 & - 7 \end{array} \right]$

D) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \ 4 & 2 & - 5 \end{array} \right]$

Quizplus · Accepted Answer

The operation $\mathrm{R}_1 = \frac{1}{2} \mathrm{r}_1$ is applied to the first row only, dividing each element of the first row by 2.

Perform the Row Operation(s) on the Given Augmented Matrix A) [1−1−221−52]\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \\ 2 & 1 & - \frac { 5 } { 2 } \end{array} \right][12​−11​−2−25​​]

Perform the Row Operation(s) on the Given Augmented Matrix A) $\left[ \begin{array} { r r | r } 1 & - 1 & - 2 \\ 2 & 1 & - \frac { 5 } { 2 } \end{array} \right]$