### Home > CALC > Chapter 6 > Lesson 6.2.1 > Problem6-64

6-64.
1. Let f(x) = ex , so that f1 (x) = ln x. Write an expression that represents each of the expressions below, then simplify. Homework Help ✎

1. f(f1 x))

2. f −1(f(x))

3. f(f −l(3x))

4. f −l(f(3x))

Do you remember the definition of inverse functions?
f(x) and g(x) are inverses if f(g(x)) = x...
Well, f(f −1(x)) = elnx = ______

Refer to the hint in part (a).

Refer to the hint in part (a).

Let 3x = U.