Identify the indicated submatrix.
-$A = \left[ \begin{array} { r r | r } 2 & 6 & 1 \ - 2 & 0 & - 1 \ 0 & 3 & - 6 \ \hline 3 & 6 & 3 \end{array} \right] .$
A) $[ 6 ]$
B) $\left[ \begin{array} { l l } 3 & 6 \end{array} \right]$
C) $[ - 2 ]$
D) $\left[ \begin{array} { r } 1 \ - 1 \ - 6 \end{array} \right]$

Question

Quizplus · Accepted Answer

The indicated submatrix is the 1x2 submatrix in the first row and second and third columns.

Identify the Indicated Submatrix A=[261−20−103−6363].A = \left[ \begin{array} { r r | r } 2 & 6 & 1 \\ - 2 & 0 & - 1 \\ 0 & 3 & - 6 \\ \hline 3 & 6 & 3 \end{array} \right] .A=​2−203​6036​1−1−63​​​.

Identify the Indicated Submatrix $A = \left[ \begin{array} { r r | r } 2 & 6 & 1 \\ - 2 & 0 & - 1 \\ 0 & 3 & - 6 \\ \hline 3 & 6 & 3 \end{array} \right] .$