Hi,
First post here
Anyway, I'm currently stuck on this question and I have no idea how to get any furfther, so I would really appreciate any help with it.
Differentiate using first principles:
f(x) = ln(1+e^x)
I've managed to get to this point:
f'(x) = lim(h -> 0) (ln((e^x+e^-h)/(e(^x)+1)))/h
But I don't know how to get rid of the log, or the h's for that matter.
Cheers, Paul.
Edit: Sorry the thread title should say exponential functions, too tired.