Hi, I'm new here and I have this same problem that I'm trying to tackle at the moment (sorry for the necroposting).
I'm currently stuck at sqrt((e^2x + 1)^2 / (e^2x + 1)(e^2x - 1))
This is what I've thought of so far:
Cancel out e^2x - 1 from numerator and denominator to give:
sqrt((e^2x +...