फलन $\frac{2x}{1 + x^2}$ का समाकलन कीजिए।

  • A
    $\log |1 + x^2| + C$
  • B
    $\log |1 - x^2| + C$
  • C
    $\frac{1}{2} \log |1 + x^2| + C$
  • D
    $\log |x^2| + C$

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