Which expression represents the inverse of f(x)=3x−1+2f(x) = 3^{x-1} + 2f(x)=3x−1+2?
f^{-1}(x) = 1 + \log_3(x-2)
f^{-1}(x) = 1 - \log_3(x-2)
f^{-1}(x) = \log_3(x+1) - 2
f^{-1}(x) = 3^{x+1} - 2