[" 13.If "alpha=e^(2 pi/n)," then "(11-a...

[" 13.If "alpha=e^(2 pi/n)," then "(11-alpha)(11-alpha^(2))...(11-alpha^(n-1))=],[[" (1) "11^(n-1)," (2) "(11^(n)-1)/(10)," (3) "(11^(n-1)-1)/(10)," (4) "(11^(n-1)-1)/(11)]]

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