Find the Minor $M _ { 13 }$ And Its Cofactor $C _ { 13 }$

question 111

Multiple Choice

Find the minor $M _ { 13 }$ and its cofactor $C _ { 13 }$ of the matrix $\left[ \begin{array} { c c c } - 3 & 2 & - 8 \\ 3 & - 2 & 6 \\ - 1 & 3 & - 6 \end{array} \right]$ .

• A) \(M _ { 13 } = \left| \begin{array} { r r } - 3 & - 8 \\ - 1 & - 6 \end{array} \right| = 10\)
• \[C _ { 13 } = - 10\]
• B) \(M _ { 13 } = \left| \begin{array} { c c } 2 & - 8 \\ - 2 & 6 \end{array} \right| = - 4\)
• \[C _ { 13 } = - 4\]
• C) \(M _ { 13 } = \left| \begin{array} { c c } 3 & - 2 \\ - 1 & 3 \end{array} \right| = 7\)
• \[C _ { 13 } = - 7\]
• D) \(M _ { 13 } = \left| \begin{array} { c c } 2 & - 8 \\ - 2 & 6 \end{array} \right| = - 4\) \(C _ { 13 } = 4\)
• E)
• \[\begin{array} { l }
• M _ { 13 } = \left| \begin{array} { c c }
• 3 & - 2 \\
• - 1 & 3
• \end{array} \right| = 7 \\
• C _ { 13 } = 7
• \end{array}\]

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