Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Math Forum
»
Discussions
»
sci.math.*
»
sci.math
Notice: We are no longer accepting new posts, but the forums will continue to be readable.
Topic:
Unbounded second derivative
Replies:
4
Last Post:
Dec 4, 2012 7:00 AM




Unbounded second derivative
Posted:
Dec 3, 2012 6:17 AM


Hi all,
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.
Best regards,
Jose Carlos Santos



