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

question 158

Multiple Choice

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

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