Proving the Natural Logarithm Property: ln(e)=1

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SUMMARY

The discussion focuses on proving the property of the natural logarithm that states ln(e) = 1. Participants utilize the definition of the natural logarithm as the antiderivative from 1 to x of dt/t and the limit definition of e, specifically e = lim as n approaches infinity of (1 + 1/n)^n. The application of L'Hôpital's Rule is suggested to transform the limit expression ln(e) = lim as n approaches infinity of n ln(1 + 1/n) into a solvable form, confirming that ln(e) indeed equals 1.

PREREQUISITES
  • Understanding of natural logarithms and their properties
  • Familiarity with the limit definition of the mathematical constant e
  • Knowledge of L'Hôpital's Rule for evaluating limits
  • Basic calculus concepts, including antiderivatives
NEXT STEPS
  • Study the derivation of the limit definition of e in detail
  • Learn how to apply L'Hôpital's Rule to various limit problems
  • Explore the properties of logarithmic functions and their applications
  • Investigate the relationship between exponential functions and natural logarithms
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Students studying calculus, mathematics educators, and anyone interested in understanding the properties of logarithmic functions and their proofs.

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Homework Statement


Show that ln(e)=1.


Homework Equations


ln(x)=antiderivative from 1 to x of dt/t


The Attempt at a Solution


I assume we have to use the fact that e= lim as n->infinity of (1+1/n)^n, and perhaps can apply l'Hopital's rule to transform that limit -- but I'm not sure where to go from there.
 
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If e = \lim_{n \to \infty}(1 + \frac{1}{n})^n, then we know that ln(e) = \lim_{n \to \infty}(n)ln(1 + \frac{1}{n}). Now put this in a form where you can apply L'Hospital's Rule.
 
Ah, I see! Thank you.
 

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