If the system of equations \( x+a y=0, a z+y=0 \) and \( a x+z=0 \) has infinite solutions then ....

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If the system of equations \( x+a y=0, a z+y=0 \) and
\( \mathrm{P} \)
\( a x+z=0 \) has infinite solutions then the value of ' \( a \) '
W
is
(1) -1
(2) 1
(3) 0
(4) No real value


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