How would I go about finding the inverse of the function f(x)=3+x+e^x
I can rewrite the forumla interchanging the x and y variables to obtain
x = 3+y+e^y
but I'm not sure where to go from here.
this one: http://www.amazon.com/Calculus-Trans.../dp/0538497904
the full question says
f(x)=3+x+e^x and then asks what f^-1(4) is
NOTE: by f^-1(4) I mean 'the inverse function of f at 4'