Evaluate: `int1/(1+e^(-x))\ dx`

Explanation

`\text { evaluate } \int \frac{1}{1+e^{-x}} d x`


`I=\int \frac{1}{1+\frac{1}{e^{x}}} d x`




`I=\int \frac{e^{x}}{1+e^{x}} d x`


`I=\int \frac{1+e^{x}-1}{1+e^{x}} d x`

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