Find the Inverse of the Matrix $$\left[ \begin{array} { l l l } 1 & 0 & 0 \\5 & 1 & 0 \\0 & 7 & 1\end{array} \right]$$

question 144

Multiple Choice

Find the inverse of the matrix.
- $$\left[ \begin{array} { l l l } 1 & 0 & 0 \\5 & 1 & 0 \\0 & 7 & 1\end{array} \right]$$

• A) \(\left[ \begin{array} { r r r } 1 & 0 & 0 \\ - 5 & 1 & 0 \\ 35 & - 7 & 1 \end{array} \right]\)
• B) \(\left[ \begin{array} { r r r } 1 & 7 & - 35 \\ 0 & 1 & 1 \\ 0 & 0 & 1 \end{array} \right]\)
• C) \(\left[ \begin{array} { l l l } 1 & 0 & 0 \\ 5 & 1 & 0 \\ 0 & 0 & 7 \end{array} \right]\)
• D) \(\left[ \begin{array} { r r r } 1 & 0 & 0 \\ 7 & - 1 & 0 \\ - 35 & 5 & 1 \end{array} \right]\)

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