1.

Find the minor and cofactor respectively for the element 3 in the determinant Δ=\(\begin{vmatrix}1&5\\3&6\end{vmatrix}\).

A. M21=-5, A21=-5
B. M21=5, A21=-5
C. M21=-5, A21=5
D. M21=5, A21=5
Answer» C.


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