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[" For a real number "alpha" ,if the sys...

[" For a real number "alpha" ,if the system "],[[[1,alpha,alpha^(2)],[alpha,1,alpha],[alpha^(2),alpha,1]][[x],[y],[z]]=[[1],[-1],[1]]" of linear equations,has "],[" infinitely many solutions,then "1+alpha+alpha^(2)=]

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