An ordered pair \( (\alpha, \beta) \) for which the system of linea...

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An ordered pair \( (\alpha, \beta) \) for which the system of linear equations
(2019 Main, 12 Jan I)
\( \mathrm{P} \)
\[
\begin{array}{l}
(1+\alpha) x+\beta y+z=2 \\
\alpha x+(1+\beta) y+z=3 \\
a x+\beta y+2 z=2
\end{array}
\]
W has a unique solution, is
(a) \( (2,4) \)
(b) \( (-4,2) \)
(c) \( (1,-3) \)
(d) \( (-3,1) \)
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