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If z^(2)+z+1=0 then sum(r=1)^(6)(z^(r)...

If `z^(2)+z+1=0 ` then `sum_(r=1)^(6)(z^(r)+(1)/(z^(r)))^(2)=`

A

6

B

12

C

18

D

24

Text Solution

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The correct Answer is:
B
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HIMALAYA PUBLICATION-COMPLEX NUMBERS-QUESTION BANK
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