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utf07-001

True or False. If false, give a counter-example.

  1. If $ f( {-1}) = -1$ and $ f( 1) = 1$, then $ f( 0) = 0$.
  2. If $ f( {-1})=-1$ and $ f( 1) = 1$, then there is a point $c$, such that $-1 If $ f( {-1}) = -1,       f( 1) = 1$, and $ f( x)$ is continuous, then there is a point $c$, $   -1 If $ f( 0) = 0,       f( 1) =10$ and $ f( x)$ is continuous, then on the interval $ [0,10],       f( x)$ must have a maximum or a minimum value.
  3. If $ f( x)$ is continuous at a point $a$ then it is differentiable there.



Tags: continuity, IVT, diff, max-min, abstract-function, creating-counterexamples, true-false, t1, c2
One could extend this problem by adding: If true, why is it true?; If false, can you change the statement to make it true?

James Epperson 1998-08-09