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Integral of e

  • Thread starter fumoffu
  • Start date
  • #1
2
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Homework Statement



before we start, i don't know how to do the integral sign, so we'll use [

I need to integrate
[ e^(-3x) / 1 + e^(-3x)



Homework Equations



I've always had trouble with doing integration with e

The Attempt at a Solution



I used u=1+e^(-3x)
du = -3e^(-3x)

so du/3 = e^(-3x)

I then do

(1/-3) [ u and i end up with the answer 1/-3 (1+e^(-3x)) + c


answer that i am supposed to get is

-1/3ln|1 + e^(-3x)| + C
 

Answers and Replies

  • #2
2
0
nevermind, stupid post. i got it.. :D
 

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