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If (1+sqrt(3)i)/(2) is a root of the equ...

If `(1+sqrt(3)i)/(2)` is a root of the equation `x^(4)-x^(3)+x-1=0` then its real roots are,

A

1, 1

B

`-1, -1`

C

1, 2

D

1, -1

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The correct Answer is:
D
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