Practice: Finding the Inverse of a Function

Practice: Finding the Inverse of a Function

Find the inverse f−1f^{-1} of the function f(x)=2−e3x+1f\left(x\right)=2-e^{3x+1}, and determine its domain.

a. f−1(x)=ln⁡(3x−1)−2f^{-1}\left(x\right)=\ln\left(3x-1\right)-2; domain of f−1f^{-1} is (13,∞)\left(\frac{1}{3},\infty\right)
b. f−1(x)=ln⁡(x−2)−13f^{-1}\left(x\right)=\frac{\ln\left(x-2\right)-1}{3}; domain of f−1f^{-1} is (2,∞)\left(2,\infty\right)
c. f−1(x)=ln⁡(2−x)−13f^{-1}\left(x\right)=\frac{\ln\left(2-x\right)-1}{3}; domain of f−1f^{-1} is (−∞,2)\left(-\infty,2\right)
d. f−1(x)=3ln⁡(2x)−3f^{-1}\left(x\right)=3\ln\left(\frac{2}{x}\right)-3; domain of f−1f^{-1} is (0,∞)\left(0,\infty\right)
e. None of the above

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