Homework Statement
f(x)=1+e^x/1-e^xHomework Equations
truth is, I don't even know how to approach this, i know i have to swap the variables but now I'm all confused because a friend told me to do this, in this particular case
f(x)=[1+(e^f)-1^x]/[1-(e^f)-1^x]
The Attempt at a Solution
i don't...