# Math Help - again differentiable

1. ## again differentiable

I have some problem with the post reply(doesnt appear the post reply page)

$f:R \longmapsto R$
$|f(x)| \leqslant x^2$
the same problem but differentiable in x=0

2. Ok, so do you just get a blank page or something? I would suggest sending a PM to some of the administrators or to the moderator. Hope the problem will solve itself.