$\int \frac{2x}{(2x + 1)^2} dx = $

  • A
    $\frac{1}{2}\log(2x + 1) + \frac{1}{2(2x + 1)} + c$
  • B
    $\frac{1}{2}\log(2x + 1) - \frac{1}{2(2x + 1)} + c$
  • C
    $2\log(2x + 1) + \frac{1}{2(2x + 1)} + c$
  • D
    $2\log(2x + 1) - \frac{1}{2(2x + 1)} + c$

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