1.

 If \[\frac{1+\sqrt{3}\,i}{2}\] is a root of equation \[{{x}^{4}}-{{x}^{3}}+x-1=0\]  then its real roots are [EAMCET 2002]

A. 1, 1
B. - 1, - 1
C. 1, - 1
D. 1, 2
Answer» D. 1, 2


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