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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Determinants
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The system of equations $\alpha x+y+z=\alpha-1$, $x+\alpha y+z=\alpha-1$, $x+y+\alpha z=\alpha-1$ has infinite solutions if $\alpha$ is

$(a)\;-2\qquad(b)\;either \;-2\;or\;1\qquad(c)\;not\;-2\qquad(d)\;1$

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