Determine If the Matrix Is in Row-Echelon Form $$\left[ \begin{array} { r r r r | r } 1 & 0 & 0 & 0 & 2 \\0 & 1 & 0 & 0 & 4 \\0 & 0 & - 1 & 0 & 9 \\0 & 0 & 0 & 1 & - 6\end{array} \right]$$

question 151

Multiple Choice

Determine if the matrix is in row-echelon form.
- $$\left[ \begin{array} { r r r r | r } 1 & 0 & 0 & 0 & 2 \\0 & 1 & 0 & 0 & 4 \\0 & 0 & - 1 & 0 & 9 \\0 & 0 & 0 & 1 & - 6\end{array} \right]$$

• A) No
• B) Yes

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