\input $HOME/tex_doc/format/myplain.tex %\magnification 1200 %\advance \vsize by 20mm \let \exo \Exo \withoutexobody \date {19 mai 2004} \classe {2L} \titre {\twentybf Corrigé du devoir surveillé n\raise 5pt \hbox {\tenbf o} 12} \def \datapath {% $HOME/tex_doc/lycee/database/2nd/algebre/inequations/} \input \datapath frct_011.tex \def \datapath {% $HOME/tex_doc/lycee/database/2nd/algebre/valeur_absolue/} \input \datapath ineq_003.tex \def \datapath {% $HOME/tex_doc/lycee/database/2nd/geometrie/transform/} \input \datapath synt_001.tex \input \datapath demo_001.tex \bye