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MMLU / If f: R -> R is a bounded function that is Lebesgue integrable, then which of…

Problem

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question

If f: R -> R is a bounded function that is Lebesgue integrable, then which of the following must be true?

choices

  1. f is Riemann integrable.
  2. There does not exist a countably infinite E of R such that f is nondifferentiable at every x \in E.
  3. There does not exist an uncountable subset E of R such that f is nondifferentiable at every x \in E.
  4. None of the above.

subject

college_mathematics

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