[quote=&quot;Massimo Gobbino&quot;:imtxyw8y]Tanto valeva allora usare [tex:imtxyw8y]f&#40;x&#41;=\log&#40;1+e^x&#41;[/tex:imtxyw8y]  <!-- s:lol: --><img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /><!-- s:lol: --> ...[/quote:imtxyw8y]

è che in 0 deve fare 1  <!-- s:roll: --><img src="{SMILIES_PATH}/icon_rolleyes.gif" alt=":roll:" title="Rolling Eyes" /><!-- s:roll: -->