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Let x,y,z be the distinctcommon rootsof equationa^10=1 and a^15=1such that :there realpart is positive and omega=|(1+x^2+x^4,1+xy+x^2y^2, 1+xz+y^2+z^2),(1+xy+y^2z^2, 1+y^2+y^4,1+xy+y^2z^2),(1+xz+x^2z^2, 1+yz+y^2z^2,1+z^2+z^4)| then : |
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Answer» `OMEGA`is purely real |
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