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[" 21.Let "omega=e^(" ins ")" and "a,b,c...

[" 21.Let "omega=e^(" ins ")" and "a,b,c,x,y,z" be non-zero complex "],[" numbers such that "a+b+c=x,a+b omega+c omega^(2)=y" ,"],[a+b omega^(2)+c omega=z" ,"],[" Then,the value of "(|x|^(2)+|y|^(2)+|z|^(2))/(|a|^(2)+|b|^(2)+|c|^(2))" is "......." (2011"]

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