Solving a limit with L'H's rule

  • Thread starter Thread starter Turion
  • Start date Start date
  • Tags Tags
    Limit
Click For Summary
SUMMARY

The discussion centers on applying L'Hôpital's rule to solve limits involving exponential and power functions. Participants confirm that it is permissible to apply L'Hôpital's rule multiple times until a determinate form is achieved. A key point raised is the differentiation of the denominator, where the correct derivative is noted as et instead of eα, indicating a potential typo. The consensus is that exponential functions outpace power functions in growth, which is crucial for evaluating limits.

PREREQUISITES
  • Understanding of L'Hôpital's rule
  • Knowledge of derivatives and differentiation techniques
  • Familiarity with limits in calculus
  • Concept of growth rates of functions, particularly exponential vs. polynomial
NEXT STEPS
  • Study advanced applications of L'Hôpital's rule in calculus
  • Explore the properties of exponential functions compared to polynomial functions
  • Learn about Taylor series expansions for approximating functions
  • Investigate common limit forms and their resolutions in calculus
USEFUL FOR

Students studying calculus, particularly those tackling limits and derivatives, as well as educators looking for examples of L'Hôpital's rule applications.

Turion
Messages
145
Reaction score
2

Homework Statement



OErDOT2.png


Homework Equations


The Attempt at a Solution



YG1M1Fh.png


Are you allowed to do that where you just apply L'H an infinite amount of times?
 
Physics news on Phys.org
Turion said:

Homework Statement



OErDOT2.png


Homework Equations





The Attempt at a Solution



YG1M1Fh.png

After taking the derivative of the denominator, you should get et, not eα. I suspect that was a typo.

Anyway, your limit is correct. The basic idea is that power functions, such as tα grow large, but exponential functions grow large faster.
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 13 ·
Replies
13
Views
6K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 3 ·
Replies
3
Views
3K
Replies
8
Views
2K
  • · Replies 4 ·
Replies
4
Views
7K
Replies
9
Views
2K