Which best expresses the inverse of f(x) = (3x + 1) 3 − 2? f −1 (x) = 3 √ x + 1 3 ⊝ f −1 (x) = 3 √ x + 2 − 1 3 f −1 (x) = √ x + 2 − 1 3 ⊝ f −1 (x) = √ 3x + 1 27