Question

Minors and Cofactors? I just don't get it

Answer 1

Any one know about this?

Answer 2

is this to do with matrices?

Answer 3

yes it does.

Answer 4

any one there?

Answer 5

ok - hmm long time ago when i did these -
a cofactor of a matrix is the cofactor of the determinant of the matrix
its difficult to explain here. your best bet is to google it os check out the wolfram sites.

Answer 6

i'll explain some of it here
for the determinant

| a b c |
| d e f |
| g h i |
the cofactor of e is

(-1)^4 | a c | = ai - gc
| g i |

- note that the letters are obtained by 'blanking out' the column and row whch e is on





\
\

Answer 7

the minor of the determinant is the | a c |
| g i |
(without the sign outside)

Answer 8

whats the minor?