$\int \frac{1}{e^x+1} \, dx =$

  • A
    $x + \log(e^x + 1) + c$,जहाँ $c$ समाकलन स्थिरांक है।
  • B
    $x - \log(e^x + 1) + c$,जहाँ $c$ समाकलन स्थिरांक है।
  • C
    $\log(e^x + 1) - x + c$,जहाँ $c$ समाकलन स्थिरांक है।
  • D
    $\log(e^x - 1) - x + c$,जहाँ $c$ समाकलन स्थिरांक है।

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