Intermediate Value Theorem Converse

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SUMMARY

The discussion centers on the validity of the Converse of the Intermediate Value Theorem (IVT). The participant concludes that the converse is false, as it does not guarantee the continuity of a function even if there exists a number c in the interval [a, b] such that f(c) = k. The key takeaway is that the continuity of the function is not assured solely by the existence of such a c, challenging the assumptions made in the original theorem.

PREREQUISITES
  • Understanding of the Intermediate Value Theorem (IVT)
  • Basic knowledge of function continuity
  • Familiarity with closed intervals in real analysis
  • Ability to analyze mathematical proofs and counterexamples
NEXT STEPS
  • Study the properties of continuous functions in real analysis
  • Explore counterexamples to the Converse of the Intermediate Value Theorem
  • Review the definitions and implications of the Intermediate Value Theorem
  • Investigate related theorems in calculus, such as the Mean Value Theorem
USEFUL FOR

Students studying calculus, particularly those focusing on real analysis and the properties of continuous functions, as well as educators seeking to clarify misconceptions about the Intermediate Value Theorem.

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Homework Statement


I was given the problem of determining if the Converse of the Intermediate Value Theorem in my book was true. Below is my theorem from the book.

Homework Equations

The Attempt at a Solution


I had looked at the converse and tried to draw some examples, and I am thinking it is false. I am leaning that way, because technically the function may or may not be continuous. I just need to know if I am on the right direction.
 

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KF33 said:

Homework Statement


I was given the problem of determining if the Converse of the Intermediate Value Theorem in my book was true. Below is my theorem from the book.

Homework Equations

The Attempt at a Solution


I had looked at the converse and tried to draw some examples, and I am thinking it is false. I am leaning that way, because technically the function may or may not be continuous. I just need to know if I am on the right direction.

What, exactly, would be the converse of the intermediate-value theorem?
 
Ray Vickson said:
What, exactly, would be the converse of the intermediate-value theorem?
If there is at least one number c in [a,b] such that f(c)=k, then f is continuous on the closed interval [a,b] and k is any number between f(a) and f(b). I got the answer though I think.
 

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