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Integrating Reciprocated Exponential Function!

Calculus Level 2

\[ \large \int \dfrac1{1 + e^{-x}} \, dx = \, ? \]

Clarification: \(C\) denotes the arbitrary constant of integration.

\[ \ln(1 - e^{-x}) + C \] \[ \ln(1 - e^x) + C \] \[ \ln(1 + e^x) + C \] \[ \ln(1 + e^{-x}) + C \]

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by Kirubel Solomon

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