%@AUTEUR:Guillaume Connan prologues:=2; input courbes; input geo; color vert_e, turquoise, orange, vert_fonce, rose, vert_mer, bleu_ciel, or, rouge_v,bleu_m,bleu,bleu_f; vert_e:=(0,0.790002,0.340007); turquoise:=(0.250999,0.878399,0.815699); orange:=(0.589999,0.269997,0.080004); vert_fonce:=(0,1.4*0.392193,0); rose:=(1.0, 0.752907, 0.796106); bleu_ciel:=(1.2*0.529405,1.2*0.807794,1);%.2*0.921598); or:=(1,0.843104,0); rouge_v:=(0.829997,0.099994,0.119999); bleu_m:=(0.7*0.529405,0.7*0.807794,0.7);%*0.921598); bleu_f:=(0.211762,0.3231176,0.3686392); bleu:=(0.529405,0.807794,1); % Reci Fonction puissance paire beginfig(1); vardef axes = drawarrow (ux*xmin,0) -- (ux*xmax,0); % axe des x drawarrow ((0,uy*ymin) -- (0,uy*ymax)) ; % axe des y label.lrt(btex $x$ etex,(xmax*ux,0)); % label de l'axe des x label.urt(btex $y$ etex,(0,ymax*uy)); % label de l'axe des y enddef; % Déclarations des constantes % ux:=1cm; uy:=0.5*ux; xmin:=-4.5; xmax:=4.5; ymin:=-0.5; ymax:=8; coefficient:=1; % coefficient d'échelle %Tracé des axes axes; label.llft(btex $0$ etex,(-.1*ux,-.15*uy)); vardef f(expr x) =0.3*x*x enddef; vardef trace (suffix g)(expr a,b,inc) = save i; numeric i; for i=a step inc until b: (i*ux,f(i)*uy) .. endfor (b*ux,f(b)*uy) enddef; draw (trace(g,-4.5,0,.10)) dashed evenly withcolor bleu_m; draw (trace(g,0,4.5,.10)) withcolor bleu_m; endfig; end