If the system of linear equations \[ \begin{array}{c} x+k y+3 z=0 \...

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If the system of linear equations
\[
\begin{array}{c}
x+k y+3 z=0 \\
3 x+k y-2 z=0 \\
2 x+4 y-3 z=0
\end{array}
\]
\( \mathrm{P} \)
W
has a non-zero solution \( (x, y, z) \), then \( \frac{x z}{y^{2}} \) is equal to :
(1) 10
(2) \( -30 \)
(3) 30
(4) \( -10 \)
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