Write the Matrix in Reduced Row-Echelon Form $\left[ \begin{array} { c c c c } 7 & - 5 & 4 & 1 \\- 7 & 3 & - 2 & 21 \\8 & 2 & 3 & - 53\end{array} \right]$

question 22

Multiple Choice

Write the matrix in reduced row-echelon form. $\left[ \begin{array} { c c c c } 7 & - 5 & 4 & 1 \\- 7 & 3 & - 2 & 21 \\8 & 2 & 3 & - 53\end{array} \right]$

• A) \(\left[ \begin{array} { l l l l }
• 1 & 0 & 0 & 0 \\
• 0 & 1 & 0 & 0 \\
• 0 & 0 & 1 & 0
• \end{array} \right]\)
• B) \(\left[ \begin{array} { c c c c }
• 1 & 0 & 1 & - 7 \\
• 0 & 1 & 0 & 5 \\
• 0 & 0 & 1 & - 6
• \end{array} \right]\)
• C) \(\left[ \begin{array} { c c c c }
• 1 & 0 & 0 & - 8 \\
• 0 & 1 & 0 & - 5 \\
• 0 & 0 & 1 & 5
• \end{array} \right]\)
• D) \(\left[ \begin{array} { c c c c }
• 1 & 0 & 0 & - 7 \\
• 0 & 1 & 0 & - 6 \\
• 0 & 0 & 1 & 5
• \end{array} \right]\)
• E) \(\left[ \begin{array} { l l l l }
• 1 & 0 & 0 & 1 \\
• 0 & 1 & 0 & 1 \\
• 0 & 0 & 1 & 1
• \end{array} \right]\)

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