. Let a be a positive number. Prove that for each real number x there is an integer n such that na < x < (n + 1)a.
. Let a be a positive number. Prove that for each real number x there is an integer n such that na < x < (n + 1)a.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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![**Mathematical Concept: Inequality Involving Real Numbers and Integers**
**Problem Statement:**
Let \( a \) be a positive number. Prove that for each real number \( x \), there is an integer \( n \) such that:
\[
na \leq x < (n + 1)a
\]
**Explanation:**
This problem explores the concept of dividing the real number line into intervals of equal length \( a \) and asserts that any real number \( x \) can be found within one of these intervals. Specifically, the interval is determined by an integer \( n \), ensuring that \( x \) falls between \( na \) and \( (n+1)a \).
**Approach:**
- Consider the division of the real number line into segments of equal length, \( a \).
- For each \( x \), there exists an integer \( n \) such that \( na \) serves as the left endpoint and \((n+1)a\) as the right endpoint of the interval containing \( x \).
- This principle is related to the concept of floor and ceiling functions in mathematics.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fde096970-4fbf-4bcb-afca-efa41531f77d%2F0fadd3ba-2aff-414c-bdd3-f290f64f43ac%2Fac83j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Mathematical Concept: Inequality Involving Real Numbers and Integers**
**Problem Statement:**
Let \( a \) be a positive number. Prove that for each real number \( x \), there is an integer \( n \) such that:
\[
na \leq x < (n + 1)a
\]
**Explanation:**
This problem explores the concept of dividing the real number line into intervals of equal length \( a \) and asserts that any real number \( x \) can be found within one of these intervals. Specifically, the interval is determined by an integer \( n \), ensuring that \( x \) falls between \( na \) and \( (n+1)a \).
**Approach:**
- Consider the division of the real number line into segments of equal length, \( a \).
- For each \( x \), there exists an integer \( n \) such that \( na \) serves as the left endpoint and \((n+1)a\) as the right endpoint of the interval containing \( x \).
- This principle is related to the concept of floor and ceiling functions in mathematics.
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