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>>> This is probably very simple, but I can't see it. :-) Let f be a]]> Dec 4, 2012 7:00:50 AM Dec 4, 2012 7:00:50 AM jcsantos@fc.up.pt 0 http://mathforum.org/kb/thread.jspa?messageID=7931669&tstart=0#7931669 > On 03-12-2012 11:17, José Carlos Santos wrote:
>
Dec 3, 2012 11:57:42 AM Dec 3, 2012 11:57:42 AM Rotwang 1 http://mathforum.org/kb/thread.jspa?messageID=7931655&tstart=0#7931655 <jcsantos@fc.up.pt> wrote:

>Hi]]> Dec 3, 2012 11:31:47 AM Dec 3, 2012 11:31:47 AM ullrich@math.okstate.edu 0 http://mathforum.org/kb/thread.jspa?messageID=7931646&tstart=0#7931646
> This is probably very simple, but I can't see it. :-) Let f be a]]> Dec 3, 2012 11:08:37 AM Dec 3, 2012 11:08:37 AM jcsantos@fc.up.pt 2 http://mathforum.org/kb/thread.jspa?messageID=7931537&tstart=0#7931537
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)]]> Dec 3, 2012 6:17:24 AM Dec 3, 2012 6:17:24 AM jcsantos@fc.up.pt 4