Suppose a1, a2, ..., an, ... is a list of positive real numbers, and assume an+1 < ) an for all n e Z+. Use induction to show that an < G)" a1 for all n E Zt.
Suppose a1, a2, ..., an, ... is a list of positive real numbers, and assume an+1 < ) an for all n e Z+. Use induction to show that an < G)" a1 for all n E Zt.
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Transcribed Image Text:### Mathematical Induction Problem
**Problem Statement:**
Suppose \( a_1, a_2, \ldots, a_n, \ldots \) is a list of positive real numbers, and assume \( a_{n+1} \leq \left(\frac{1}{2}\right) a_n \) for all \( n \in \mathbb{Z}^+ \). Use induction to show that \( a_n \leq \left(\frac{1}{2}\right)^n a_1 \) for all \( n \in \mathbb{Z}^+ \).
**Explanation:**
To solve this problem, you need to use mathematical induction. Here's a step-by-step approach:
1. **Base Case:**
- Verify the statement for \( n = 1 \).
2. **Induction Hypothesis:**
- Assume the statement is true for some \( k \in \mathbb{Z}^+ \). That is, assume \( a_k \leq \left(\frac{1}{2}\right)^k a_1 \).
3. **Inductive Step:**
- Prove the statement for \( k + 1 \). That is, show that \( a_{k+1} \leq \left(\frac{1}{2}\right)^{k+1} a_1 \).
By following these steps, the given inequality can be proven true for all positive integers \( n \). This use of induction demonstrates the power of this mathematical technique in proving statements related to sequences and series.
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