Question

If $\left| \begin{matrix} y + z & x & x \\ y & z + x & y \\ z & z & x + y \end{matrix} \right| = k(xyz)$, then k is equal to

• A. 4
• B. -4
• C. Zero
• D. None of these

Answer 1

Answer: (A)

4

Answer 2

Putting x = 1 y = 1,

and z = 1 on both sides, we get k = 4