Find limn→∞ sup(sn) and lim, inf(sn) for the sequence: Sn = 1+ Find lim,→∞ sup(8n) and lim,,→ inf(sn) for the sequence: Sn = n Find limn→∞ sup(sn) and lim,→ inf(sn) for the sequence: {sn} = {1,0, 1, 0, 1, 0, 1, 0, ...}

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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### Transcription for Educational Website

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**Problem Statement**

1. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence:

   \[
   s_n = 1 + \frac{1}{n}
   \]

2. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence:

   \[
   s_n = n
   \]

3. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence:

   \[
   \{s_n\} = \{1, 0, 1, 0, 1, 0, \ldots\}
   \]

**Explanation**

- **1st Sequence:** \( s_n = 1 + \frac{1}{n} \)

  - As \( n \) approaches infinity, \( \frac{1}{n} \) approaches 0. So, \( s_n \) approaches 1.
  
- **2nd Sequence:** \( s_n = n \)

  - As \( n \) approaches infinity, the sequence itself diverges to infinity. Therefore, the supremum also approaches infinity.
  
- **3rd Sequence:** Alternating Sequence \( \{1, 0, 1, 0, 1, 0, \ldots\} \)

  - The sequence alternates between 1 and 0 indefinitely.

**Conclusion**

- For each sequence, identify the limiting behavior using the supremum and infimum concepts as required.

---

This transcription assists in understanding how to evaluate the limit superior and limit inferior for different types of sequences.
Transcribed Image Text:### Transcription for Educational Website --- **Problem Statement** 1. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence: \[ s_n = 1 + \frac{1}{n} \] 2. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence: \[ s_n = n \] 3. Find \(\lim_{n \to \infty} \sup(s_n)\) and \(\lim_{n \to \infty} \inf(s_n)\) for the sequence: \[ \{s_n\} = \{1, 0, 1, 0, 1, 0, \ldots\} \] **Explanation** - **1st Sequence:** \( s_n = 1 + \frac{1}{n} \) - As \( n \) approaches infinity, \( \frac{1}{n} \) approaches 0. So, \( s_n \) approaches 1. - **2nd Sequence:** \( s_n = n \) - As \( n \) approaches infinity, the sequence itself diverges to infinity. Therefore, the supremum also approaches infinity. - **3rd Sequence:** Alternating Sequence \( \{1, 0, 1, 0, 1, 0, \ldots\} \) - The sequence alternates between 1 and 0 indefinitely. **Conclusion** - For each sequence, identify the limiting behavior using the supremum and infimum concepts as required. --- This transcription assists in understanding how to evaluate the limit superior and limit inferior for different types of sequences.
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