Determine the inverse of f(x)=ln(x+x2+1)f(x) = \ln(x + \sqrt{x^2 + 1})f(x)=ln(x+x2+1).
ex−e−x2\frac{e^x - e^{-x}}{2}2ex−e−x
ex+e−x2\frac{e^x + e^{-x}}{2}2ex+e−x
ex−e−xe^x - e^{-x}ex−e−x
ln(x)\ln(x)ln(x)