Question
$15-20=$ Minors and Cofactors Evaluate the minor and cofactorusing the matrix $A .$$$A=\left[ \begin{array}{rrr}{1} & {0} & {\frac{1}{2}} \\ {-3} & {5} & {2} \\ {0} & {0} & {4}\end{array}\right]$$$$M_{13}, A_{13}$$
Step 1
To do this, we delete the first row and the third column of the matrix $A$. This gives us the following 2x2 matrix: $$ \left[ \begin{array}{rr}{-3} & {5} \\ {0} & {0}\end{array}\right] $$ Show more…
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$15-20=$ Minors and Cofactors Evaluate the minor and cofactor using the matrix $A .$ $$A=\left[ \begin{array}{rrr}{1} & {0} & {\frac{1}{2}} \\ {-3} & {5} & {2} \\ {0} & {0} & {4}\end{array}\right]$$ $$ M_{12}, A_{12} $$
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