[" 19."],[" If "alpha" is a non real root of "x^(6)=1" then "],[(alpha^(5)+alpha^(3)+alpha+1)/(alpha^(2)+1)=]

If alpha is a non-real root of x^(6)-1=0 then (alpha^(5)+alpha^(3)+alpha+1)/(alpha^(2)+1)

If alpha is a non real root of x^(6)=1 then alpha^(5)+alpha^(3)+alpha+1hline alpha^(2)+1

If alpha is a non-real root of x^(7) = 1 then alpha (1 + alpha)(1 + alpha^(2) + alpha^(4))=

If alpha is a non-real root of x^(7) = 1 then alpha(1 + alpha) (1 + alpha^(2) + alpha^(4)) =

If alpha is a non real root of the equation x^(6)-1=0 then (alpha^(2)+alpha^(3)+alpha^(4)+alpha^(5))/(alpha+1)

If alpha is non real fifth root of unity then alpha^(101)+alpha^(102)+alpha^(103)+alpha^(104)+alpha^(105) is