Which Functions Satisfy These Limit Conditions?

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SUMMARY

The discussion focuses on identifying functions f(x) that satisfy three specific limit conditions. The conditions are: (1) lim [x→∞] f(x)/aˣ = 0 for a ≥ e, (2) f(x)/aˣ → ∞ as x approaches infinity for 0 < a < e, and (3) lim [x→∞] f(x)^(1/x) = e. Participants suggest various functions, including exponential and polynomial forms, to meet these criteria, emphasizing the importance of understanding the behavior of functions in relation to exponential growth.

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  • Knowledge of asymptotic analysis
  • Basic concepts of growth rates in mathematical functions
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  • Study asymptotic notation and its applications in function analysis
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  • Investigate specific functions that exhibit growth behaviors, such as f(x) = eˣ and polynomial functions
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dey
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Find a function (or several or all) f(x) which satisfied all these three conditions:
(1) lim [x→∞] f(x)/aˣ = 0 if a ≥ e (2) f(x)/aˣ → ∞ when x→∞ if 0 < a < e
(3) lim [x→∞] f(x)1/x = e.
 
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