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If x^(2)+x+1=0 then sum(r=1)^(25)(x^(r)+...

If `x^(2)+x+1=0` then `sum_(r=1)^(25)(x^(r)+(1)/(x^(r)))^(2)=`

A

25

B

`25 omega`

C

`25 omega^(2)`

D

49

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The correct Answer is:
D
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