Determinants between two similar matrices

[NATURE.M]

Lets suppose a 4×4 matrix A has two identical rows with some other 4×4 matrix B. Does that imply there determinant is equal? Or does it really say nothing about how the determinants of the two matrices are related.

 

[mathman]

As long as the other rows may be different, the determinants may be different.

 

[SteamKing]

Why should two identical rows imply equality of determinants? The value of the determinant involves ALL of the elements of a matrix.

 

[NATURE.M]

I mistakingly asked this question prematurely--not releasing that I could of easily performed row operations to enable the determinants of the two matrices to be the same.

 

[HallsofIvy]

So would you mind now telling us what the question really is?