If x^2 +x+1=0 then find the value of sigma r=1to27( x^ r+ 1/ x ^ r)^2 – InterviewSolution

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1.	If x^2 +x+1=0 then find the value of sigma r=1to27( x^ r+ 1/ x ^ r)^2
Answer» If x^2 +x+1=0 then find the value of sigma r=1to27( x^ r+ 1/ x ^ r)^2

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