- #1
math007
- 10
- 0
Homework Statement
I need to solve x:
ln (1+e^-x)=-x+2
Homework Equations
The Attempt at a Solution
ln (1+e^-x)=-x+2
x+ln (1+1/e^x)=2
x+ln (e^x/e^x+1/e^x)=2
x+ln ((e^x+1)/e^x)=2
x+ln (e^x+1)-ln(e^x)=2
x+ln (e^x+1)-x=2
ln (e^x+1)=2im stuck here.
thank you