2.23. Consider f: R→ R. Let S be the set of functions defined by putting g € S if there exist positive constants c, a € R such that g(x)| ≤ c f(x)| for all x > a. Without words of negation, state the meaning of "g & S". (Comment: The set S (written as O(f)) is used to compare the "order of growth" of functions.)

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