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यदि x^(2)+x+1=0 तो सिद्ध कीजिए कि - (x...

यदि `x^(2)+x+1=0` तो सिद्ध कीजिए कि -
`(x+(1)/(x))^(2)+(x^(2)+(1)/(x^(2)))^(2)+ . . .+(x^(27)+(1)/(x^(27)))^(2)=54`

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