Mathematics: Determine the cofactor of a13 the matrix. A=[ matrix 2&-4&0\ 6&5&7\ 5&2&0 matrix ]

Determine the cofactor of a13 the matrix. A=[ matrix

Ответ:

june1198

08.04.2021

Mathematics

-168

Step-by-step explanation:

$\left[\begin{array}{ccc}2&-4&0\\6&5&7\\5&2&0\end{array}\right]$

determinant can be found by cofactor expansion:

say along third column:

$a_{13} \det(\left[\begin{array}{cc}6&5\\5&2\end{array}\right] ) -a_{23} \det \ (\left[\begin{array}{cc}2&-4\\5&2\end{array}\right] ) +a_{33} \det(\left[\begin{array}{cc}2&-4\\6&5\end{array}\right] )$

=0 -(7)[(2)(2)-(-4)(5)] +0

=-168

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Ответ:

chuchi24

17.07.2022

Mathematics

Thank you

Step-by-step explanation:

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Determine the cofactor of a13 the matrix. A=[ matrix 2&-4&0\\ 6&5&7\\ 5&2&0 matrix ]

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