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[" If "alpha" is a non-real root of "x^(...

[" If "alpha" is a non-real root of "x^(6)=1" ,then evaluate "],[qquad (alpha^(5)+alpha^(3)+alpha+1)/(alpha^(2)+1)],[" (a) "alpha^(2)],[" (c) "alpha]quad ([" b) "0],[" (d) "-alpha^(2)]

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