Phương Trâm
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Tính tích phân \(I = \int\limits_{ - 1}^1 {\frac{{xdx}}{{{x^2} + x + 1}}} \)
A. \(\frac{{\ln 3}}{2} - \frac{\pi }{{2\sqrt 3 }}\)
B. \(\frac{{\ln 3}}{2} + \frac{\pi }{{2\sqrt 3 }}\)
C. \(\frac{{\ln 2}}{2} - \frac{\pi }{{2\sqrt 2 }}\)
D. \(\frac{{\ln 2}}{2} + \frac{\pi }{{2\sqrt 2 }}\)
A. \(\frac{{\ln 3}}{2} - \frac{\pi }{{2\sqrt 3 }}\)
B. \(\frac{{\ln 3}}{2} + \frac{\pi }{{2\sqrt 3 }}\)
C. \(\frac{{\ln 2}}{2} - \frac{\pi }{{2\sqrt 2 }}\)
D. \(\frac{{\ln 2}}{2} + \frac{\pi }{{2\sqrt 2 }}\)