\input $HOME/tex_doc/format/myplain.tex \magnification 1200 \advance \vsize by 30mm \let \exo \Exo \withoutexobody \date {10 mars 2004} \classe {2L} \titre {\twentybf Corrigé du devoir surveillé n\raise 5pt \hbox {\tenbf o} 9} \def \datapath {% $HOME/tex_doc/lycee/database/2nd/algebre/inequations/} \input \datapath encadr_009.tex \input \datapath encadr_010.tex \input \datapath frct_005.tex \input \datapath frct_007.tex \def \datapath {% $HOME/tex_doc/lycee/database/2nd/analyse/fonctions/} \input \datapath parite_003.tex \bye