Wednesday, 6 February 2019

real analysis - Is a periodic function differentiable? uniformly continuous?

Let f:RR be a function such that f(x+1)=f(x) for all xR. Which of the
following statement(s) is/are true?



(A) f is bounded.
(B) f is bounded if it is continuous.

(C) f is differentiable if it is continuous.
(D) f is uniformly continuous if it is continuous.



It is a periodic function with period 1. I don't know how to proceed further...



Any Hints will be appreciated...

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