If the system of linear equation \( x+2 a y+a z=0 \), \( \mathrm{P}...

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If the system of linear equation \( x+2 a y+a z=0 \),
\( \mathrm{P} \)
\( x+3 b y+b z=0, x+4 c y+c z=0 \) has a non-zero
W
solution, then \( a, b, c \)
(1) Satisfy \( a+2 b+3 c=0 \)
(2) Are in A.P.
(3) Are in G.P.
(4) Are in H.P.
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