Evaluate: int1/(x^2-x+1)dx...

Evaluate: `int1/(x^2-x+1)dx`

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The correct Answer is:

`:.I=(2)/(sqrt(3))tan^(-1)((2x-1)/(sqrt(3)))+C" " [ "using" int(1)/(x^(2)+a^(2))dx+(1)/(a)tan^(-1)(x/a)+C]`

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