Determine Whether the Matrix Is in Echelon Form, Reduced Echelon $$\left[ \begin{array} { r r r r } 1 & 2 & 5 & - 7 \\0 & 1 & - 4 & 9 \\0 & 0 & 1 & 2\end{array} \right]$$

question 53

Multiple Choice

Determine whether the matrix is in echelon form, reduced echelon form, or neither.
- $$\left[ \begin{array} { r r r r } 1 & 2 & 5 & - 7 \\0 & 1 & - 4 & 9 \\0 & 0 & 1 & 2\end{array} \right]$$

• A)Reduced echelon form
• B)Echelon form
• C)Neither

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