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Math Help - help with integrating this...

  1. #1
    Newbie
    Joined
    Sep 2008
    Posts
    17

    help with integrating this...

    Hi,

    how do u integrate 1/(1+e^t) ?

    Thank you
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  2. #2
    Senior Member
    Joined
    Dec 2007
    From
    Anchorage, AK
    Posts
    276
    Use the fact that \frac{1}{1+e^x}=1-\frac{e^x}{1+e^x}, and that if u=1+e^x, du=e^x\,dx.

    --Kevin C.
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