1.

What is the determinant of the matrix?\(\left( {\begin{array}{*{20}{c}} x&y&{y + {\rm{\;}}z}\\ z&x&{z + x}\\ y&z&{x + y} \end{array}} \right)?\)

A. (x - y) ( y - z) (z - x)
B. (x - y) (y - z)
C. (y - z) (z - x)
D. (z - x)2 (x + y + z)
Answer» E.


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