Answer:
Ac_11 = -13
Ac_12 = 44
Ac_13 = 27
Step-by-step explanation:
Plato
The cofactors of each entry in the first row of the matrix are
Ac_11 = -13
Ac_12 = 44
Ac_13 = 27
We have to determine the cofactors of each entry in the first row of the matrix.
A set of numbers is arranged in rows and columns so as to form a rectangular array. The numbers are called the elements, or entries, of the matrix.
Therefore the cofactors of each entry in the first row of the matrix is
Ac_11 = -13
Ac_12 = 44
Ac_13 = 27
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