Inverse Function

Question

What is the inverse of the function?

f(x)=3^x+1

Answer 1

f(x) = 3^x + 1

y = 3^x + 1

x = 3^y + 1

x-1 = 3^y

log₃(x-1) = y

f^-1(x) = log₃(x-1)