【GMAT考满分数学PS题库】For which of the following functions f(x) is the r_真题_答案_解析 GMAT考满分官网

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题目内容

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?

Af(x) = -|x|
Bf(x) = 2-x
Cf(x) = 3x
D$$f(x)=\frac{4}{x}$$
Ef(x) = 5

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正确答案: C

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