
Re: Unbounded second derivative
Posted:
Dec 3, 2012 11:08 AM


On 03122012 11:17, José Carlos Santos wrote:
> This is probably very simple, but I can't see it. :) Let f be a twice > derivable function from [0,+oo[ into R such that: > > 1) lim_{x to +oo} f(x) = 0; > > 2) lim_{x to +oo} f'(x) does not exist. > > Prove that the function f'' is unbounded.
Forget it! I've done it.
Best regards,
Jose Carlos Santos

