Let A be a square matrix of stimulate n; climate the sum of the product of aspects of any type of row (column) through their cofactors is constantly equal to `|A|`
Let A be a square matrix of bespeak n; then the sum of the product of elements of any type of row (column) v the cofactors the the corresponding elements of some various other row (column) is 0.
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=2` and also let B it is in a matrix obtained from A by interchanging any two rows (columns) that A climate `|B|=-|A|`" href="/question-answer/let-aaij-be-a-square-matrix-of-order-n-ge-2-and-let-b-be-a-matrix-obtained-from-a-by-interchanging-a-1340071" data-reactid="695">
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