Proving f(x) Continuity with IVT on [0,1]

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Homework Help Overview

The problem involves proving the continuity of a function f(x) on the interval [0,1] using the Intermediate Value Theorem (IVT). The original poster states that f(0) = f(1) and seeks to demonstrate the existence of a point a(n) in the interval [0, 1 - (1/n)] such that f(a + (1/n)) = f(a).

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to define a new function g(x) = f(a + (1/n)) - f(a) and considers using the IVT to show that there exists a point where g(x) = 0. Some participants question the correctness of the problem statement, particularly regarding the interval notation and the implications for the function's domain.

Discussion Status

The discussion includes clarifications about the problem statement and the intervals involved. While one participant expresses confusion about the original poster's formulation, the original poster later acknowledges a typo. The original poster claims to have solved the problem, indicating a potential resolution, though no explicit consensus or detailed solution has been shared.

Contextual Notes

There are noted constraints regarding the interval definitions and the implications for the function's domain, which some participants have highlighted as critical to understanding the problem.

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Homework Statement


I am given that f(x) is continuous on [0,1] and f(0)=f(1)
and I have to show that for any n there exists a point a(n) in [1, 1-(1/n)] s.t. f(a+(1/n))=f(a)

Homework Equations


see above

The Attempt at a Solution


I have defined a new function, say g(x)= f(a+(1/n))-f(a) and am thinking of using the IVT to prove that there exists a point where g(x)=0 but am not quite sure how.

Thanks in advance for any help! :smile:
 
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I don't think your problem is stated correctly, whatever it is. The first problem is the interval you give [1, 1-1/n] is not in the standard form [u,v] with u ≤ v. But if you meant a is in [1-1/n, 1], that doesn't make any sense in your problem either because then a + 1/n > 1 which is outside the domain of the function.

The first step in analyzing a problem is to understand the statement of the problem which, apparently, you don't.
 
LCKurtz, I am sorry about the typo, it is supposed to be [0,1-1/n]
 
Hi, I have solved it, thanks anyway.
 

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