GMAT Problem Solving
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Source: Manhattan
Level: 3
For which of the following functions f(x) is the relation f(f(x)) = f(f(f(f(x)))) NOT true for at least some values of x not equal to zero?
- A f(x) = -|x|
- B f(x) = 2-x
- C f(x) = 3x
- D
- E f(x) = 5