Let and 2 be the non-real cube roots of unity and 1/(a+ )+1/(b+ )+1 – McqOptions

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1.	Let and 2 be the non-real cube roots of unity and 1/(a+ )+1/(b+ )+1/(c+ )=2 2 and 1/(a+ 2)+1/(b+ 2)+1/(c+ 2)=2 , then calculate 1/(a+1)+1/(b+1)+1/(c+1).
A.	1
B.	2
C.	3
D.	4
Answer» C. 3

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