Find a Function f(x) with Limit at Infinity but no Derivative Limit

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SUMMARY

The discussion centers around finding a function f(x) that has a limit as x approaches infinity, yet does not have a derivative limit. A suggested approach is to explore negative exponential functions, which can exhibit this behavior. Specifically, functions like f(x) = e^(-x) demonstrate a finite limit as x approaches infinity while having a derivative that approaches zero, thus lacking a limit itself.

PREREQUISITES
  • Understanding of limits in calculus
  • Knowledge of derivatives and their properties
  • Familiarity with exponential functions
  • Basic grasp of continuity and differentiability concepts
NEXT STEPS
  • Research the properties of negative exponential functions
  • Study the concept of limits and continuity in calculus
  • Explore examples of functions with limits at infinity and their derivatives
  • Learn about the implications of differentiability on function behavior
USEFUL FOR

Students of calculus, mathematics educators, and anyone interested in advanced function analysis and limit behavior.

AlexHall
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Hello

I need to give an example of a function f(x) such that limf(x), as x goes to infinity, exists but the limf'(x) does not. Any help?

Thx
 
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Try exploring negative exponentials.
 

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