$\int\limits_{ - 1}^1 {\frac{{{x^3} + |x| + 1}}{{{x^2} + 2|x| + 1}}} dx = a \ln 2 + b$,તો:

  • A
    $a = 2; b = 1$
  • B
    $a = 2; b = 0$
  • C
    $a = 3; b = -2$
  • D
    $a = 4; b = -1$

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