In the last post, I discussed about calculating minors of elements of given matrix. Co-factor is not very different from minors in some sense. Almost Half of the elements present in the matrix have same co-factors as their minors whereas, the rest have co-factors equal
to negative of their minors. It depends on the position of element. For matrix A, minors are represented as M11, M12 and so on but we will represent co-factors by A11, A12 and so on.
To learn about calculating co-factors, go through the two files present below. I have provided sufficient examples to make you understand about co-factors.
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