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Addition and Multiplication Properties of Roots of Unity

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SATSTM-ASLEKV

Let $a$, $b$, and $c$, be the three distinct complex solutions to the equation $x^3-1=0$.

Which of the following is NOT true?

A

If $a=1$, then $bc=1$.

B

$a+b+c=1$

C

$abc=1$

D

$ab+ac+bc=0$