Is Induction Proof Needed for this Limit Problem?

  • Thread starter Thread starter Alex13S
  • Start date Start date
  • Tags Tags
    Induction Proof
Click For Summary
SUMMARY

The discussion centers on the limit problem involving the expression lim e^-sN (s sin bN + b cos bN) as N approaches infinity. It is established that proof by induction is not applicable in this case, as the problem requires proving a statement P(s) for each positive real number s rather than for positive integers n. Participants emphasize the importance of adhering to forum rules, including using the provided template and demonstrating work up to the point of difficulty.

PREREQUISITES
  • Understanding of limits in calculus
  • Familiarity with Laplace Transforms
  • Knowledge of proof techniques, particularly mathematical induction
  • Basic trigonometric functions and their properties
NEXT STEPS
  • Review the concept of limits in calculus, focusing on exponential decay
  • Study the application of Laplace Transforms in solving differential equations
  • Learn about mathematical induction and its limitations in proofs
  • Explore trigonometric identities and their role in limit problems
USEFUL FOR

Students studying calculus, mathematicians interested in limit proofs, and anyone seeking to understand the application of Laplace Transforms in mathematical analysis.

Alex13S
Messages
1
Reaction score
0
Prove that for fixed s > 0, we have

lim e^-sN ( s sin bN + b cos bN ) = 0
N ->

This problem was in a chapter on Laplace Transforms. I'm assuming this will require proof by induction.
 
Physics news on Phys.org
Induction is used when you want to prove one statement P(n) for each positive integer n. Here you want to prove one statement P(s) for each positive real number s, so induction is of no use.

You should take a look at the rules for the homework forum before the next time you start a thread. In particular, you are required to use the template and to show us your work up to the point where you're stuck.
 
Last edited:

Similar threads

  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
6
Views
2K
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
3
Views
2K
Replies
5
Views
2K