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:::::::W>nCt@ry::vPJa:yay=:::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::<:ry::::::::::::::ZZ@NbM:Zymy;:::::::::::::::::::::::i? nCjysy:ZqryvY:::::::::::::::::::XGi_ql^;yA:vPt>W:::::b]vYxI::::::::::::::::::::::::::::::::::::::::: ::::::::::::::roZql^;yA:::::::::::::::::vTjUSlZy=:jUcMnCjysy:::::::::: :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::::::::::::Z::xI:::::::::::::::W \\H;JqryvY:::::::::::::::::::::::jU;W:1:" }{TEXT -1 0 "" }}{PARA 260 "" 0 "" {TEXT -1 24 "CHAPITRE 5: POLYN\324MES ET" }{TEXT 297 1 "\n" }{TEXT -1 22 "FRACTIONS RATIONN ELLES" }}{PARA 19 "" 0 "" {TEXT -1 39 "\251 Apprendre Maple. Alain Le \+ Stang. 2006" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 256 10 "POLYN\324MES:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "> \+ " 0 "" {MPLTEXT 1 0 8 "restart;" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 3 "Un " }{TEXT 257 8 "polyn\364me" }{TEXT -1 11 " a le type " }{TEXT 258 8 "polynom " }{TEXT -1 37 ", et peut avoir plusieurs variables :" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 44 "P :=-7*x+5*x^2+75*x^3;Q:=x*(2*x-3*y)^2*(x-y);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"PG,(%\"xG!\"(*&\"\"&\"\"\")F&\"\"#F*F**&\"#vF*)F&\" \"$F*F*" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"QG*(%\"xG\"\"\"),&F&\" \"#*&\"\"$F'%\"yGF'!\"\"F*F',&F&F'F-F.F'" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 40 "type(P,polynom),whattype(P),whattype(Q);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6%%%trueG%\"+G%\"*G" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT 259 7 "nops(P)" }{TEXT -1 77 " don ne le nombre de termes selon la forme , d\351velopp\351e ou factoris \351e , de P :" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 16 "nops(P),nops(Q);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6$ \"\"$F#" }}}{EXCHG {PARA 0 "" 0 "" {TEXT 260 5 "op(P)" }{TEXT -1 63 " \+ donne sous forme de s\351quence les termes ou les facteurs de P :" }} {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 12 "op( P);op(Q);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6%,$%\"xG!\"(,$*$)F$\"\"#\" \"\"\"\"&,$*$)F$\"\"$F*\"#v" }}{PARA 11 "" 1 "" {XPPMATH 20 "6%%\"xG*$ ),&F#\"\"#*&\"\"$\"\"\"%\"yGF*!\"\"F'F*,&F#F*F+F," }}}{EXCHG {PARA 0 " " 0 "" {TEXT 261 33 "Coefficients , degr\351 , valuation:" }{TEXT 298 34 "\nLes 2 syntaxes sont \351quivalentes:" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 14 "coeff(P,x^3); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#\"# v" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 15 "coeff(P,x,3); " }} {PARA 11 "" 1 "" {XPPMATH 20 "6#\"#v" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 80 "Obtenir tous les coefficients de P (valable lorsque P est sous \+ forme d\351velopp\351e)" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 21 " coeffs(P);coeffs(Q); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6%\"\"&\"#v!\"( " }}{PARA 8 "" 1 "" {TEXT -1 35 "Error, invalid arguments to coeffs\n " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 18 "coeffs(expand(Q));" }} {PARA 11 "" 1 "" {XPPMATH 20 "6&!#;\"#@!\"*\"\"%" }}}{EXCHG {PARA 0 " " 0 "" {TEXT -1 54 "Coefficient du terme de plus haut (de plus bas) de gr\351:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 23 "lcoeff(P),tcoeff (P); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6$\"#v!\"(" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 24 "lcoeff(Q,y),tcoeff(Q,y);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6$,$%\"xG!\"*,$*$)F$\"\"%\"\"\"F)" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 19 "Degr\351 et valuation:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 35 "degree(P),degree(Q,x),degree(Q,y); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6%\"\"$\"\"%F#" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 38 "ldegree(P),ldegree(Q,x),ldegree(Q,y); " }}{PARA 11 " " 1 "" {XPPMATH 20 "6%\"\"\"F#\"\"!" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 262 28 "FONCTIONS SUR LES POLYNOMES:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT 263 14 "quo(P,Q ,x,'r')" }{TEXT -1 80 " : quotient de la division euclidienne de P par Q , variable x , 'r' (optionnel)" }}{PARA 0 "" 0 "" {TEXT -1 41 "vari able non assign\351e recevant le reste ." }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 28 "quo(x^5-1,x^2+x+1,x, 'r');r;" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,(*$)%\"xG\"\"$\"\"\"F(*$)F&\"\"#F(!\"\"F(F(" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,&!\"#\"\"\"%\"xG!\"\"" }}}{EXCHG {PARA 0 " " 0 "" {TEXT 264 14 "rem(P,Q,x,'q')" }{TEXT -1 77 " : reste de la divi sion euclidienne de P par Q , variable x , 'q' (optionnel)" }}{PARA 0 "" 0 "" {TEXT -1 70 "variable non assign\351e recevant le quotient . \+ " }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 28 "rem(x^5 -1,x^2+x+1,x, 'q');q;" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,&!\"#\"\"\"% \"xG!\"\"" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,(*$)%\"xG\"\"$\"\"\"F(*$ )F&\"\"#F(!\"\"F(F(" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT 265 13 "Discriminant:" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 21 "discrim(x^3+a*x+b,x);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,&*$)% \"aG\"\"$\"\"\"!\"%*&\"#FF()%\"bG\"\"#F(!\"\"" }}}{EXCHG {PARA 0 "" 0 "" {TEXT 266 43 "Evaluer, ordonner, transformer un polyn\364me:" }} {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 20 "sub s(x=1+2*I,y=I,Q);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#^$!#:\"\"&" }}} {EXCHG {PARA 0 "" 0 "" {TEXT -1 51 "Ordonner Q selon les puissances d \351croissantes de y:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 20 "so rt(expand(Q),y); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,**&%\"xG\"\"\") %\"yG\"\"$F&!\"**(\"#@F&)F%\"\"#F&)F(F.F&F&*(\"#;F&)F%F)F&F(F&!\"\"*& \"\"%F&)F%F5F&F&" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 11 "D\351velopper :" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 32 "expand((x-3*y+a)*(1-a^ 2+x+y)); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,8%\"xG\"\"\"*&F$F%%\"aG \"\"#!\"\"*$F$F(F%*&F$F%%\"yGF%!\"#F,!\"$*&F,F%F'F(\"\"$*$F,F(F.F'F%*$ F'F0F)*&F'F%F$F%F%*&F'F%F,F%F%" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 59 "Regrouper les mon\364mes de l'expression en l'ind\351termin\351e a : " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 36 "collect((x-3*y+a)*(1-a^ 2+x+y),a); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,**$)%\"aG\"\"$\"\"\" !\"\"*&,&%\"xGF)*&F'F(%\"yGF(F(F()F&\"\"#F(F(*&,(F(F(F,F(F.F(F(F&F(F(* &,&F,F(*&F'F(F.F(F)F(F2F(F(" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 33 "Me ttre P sous la forme de H\366rner:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 25 "P;H:=convert(P,horner); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,(%\"xG!\"(*&\"\"&\"\"\")F$\"\"#F(F(*&\"#vF()F$\"\"$F(F (" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"HG*&,&!\"(\"\"\"*&,&\"\"&F(*& \"#vF(%\"xGF(F(F(F.F(F(F(F.F(" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 19 "with(codegen,cost);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#7#%%costG " }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 39 "Ce qui est moins co\373teux e n op\351rations:" }}}{PAGEBK }{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 18 "cost(P),cost(H); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6$,&%*additionsG\"\"#*&\"\"'\"\"\"%0multiplicationsG F(F(,&F)\"\"$*&F%F(F$F(F(" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 40 "Fact oriser sur le corps Q des rationnels" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 21 "factor(x^3+x^2+x+1); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*&,&\"\"\"F%%\"xGF%F%,&*$)F&\"\"#F%F%F%F%F%" }}}{EXCHG {PARA 0 " " 0 "" {TEXT -1 11 "Normaliser:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 23 "normal((4*x-3)^2+x-1); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,(* $)%\"xG\"\"#\"\"\"\"#;*&\"#BF(F&F(!\"\"\"\")F(" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 267 39 "RACINES ET FACTORISATION DES POLYN\324MES:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 52 "Valeur approch\351 es des z\351ros r\351els ou complexes avec " }{TEXT 268 6 "fsolve" } {TEXT -1 2 " :" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 21 "P:=x^3+x+1:fsolve (P);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#$!+Q!yK#o!#5" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 20 "fsolve(P,x,complex);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6%$!+Q!yK#o!#5^$$\"+>!R;T$F%$!++9ah6!\"*^$F'$\"++9ah6F+" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 83 "Localiser les z\351ros r\351els dans un intervalle de longueur voulue , ici 10^-3 , avec " }{TEXT 269 8 "realroot" }{TEXT -1 2 " :" }} {PARA 0 "> " 0 "" {MPLTEXT 1 0 18 "realroot(P,0.001);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#7#7$#!$*p\"%C5#!$\\$\"$7&" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 22 "Calcul des z\351ros avec " }{TEXT 270 9 "solve(P) " } {TEXT -1 1 ":" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 13 "solve(x^4+1);" }} {PARA 11 "" 1 "" {XPPMATH 20 "6&,&*$-%%sqrtG6#\"\"#\"\"\"#F)F(*&^#F*F) F%F)F),&F+F)*&#F)F(F)F$F)!\"\",&F$#F0F(*&^#F2F)F%F)F),&F3F)*&F*F)F%F)F )" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 16 "Par la fonction " }{TEXT 271 6 "factor" }{TEXT -1 25 ", on peut fa ctoriser sur " }{TEXT 296 1 "Q" }{TEXT -1 46 " ou sur le corps induit \+ par les coefficients :" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 15 "factor(x^ 4-1); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*(,&%\"xG\"\"\"F&!\"\"F&,&F% F&F&F&F&,&*$)F%\"\"#F&F&F&F&F&" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 20 "factor(x^3-I*x-I+1);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,$*(,& %\"xG\"\"\"^#F'F'F',&F&!\"\"^$F'F'F'F',&F&F'F'F'F'F*" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT 272 39 "Pour obtenir l a factorisation compl\350te:" }}{PARA 0 "" 0 "" {TEXT 299 7 " factor" }{TEXT 303 4 "(P,\{" }{XPPEDIT 18 0 "alpha[1],alpha[2];" "6$&%&alphaG6 #\"\"\"&F$6#\"\"#" }{TEXT 300 5 ",...," }{XPPEDIT 18 0 "alpha[n];" "6# &%&alphaG6#%\"nG" }{TEXT 301 2 "\})" }{TEXT 302 2 " " }{TEXT -1 77 "a utorise Maple \340 factoriser P sur un corps contenant les nombres alg \351briques\n" }{XPPEDIT 18 0 "alpha[1],alpha[2];" "6$&%&alphaG6#\"\" \"&F$6#\"\"#" }{TEXT 304 5 ",...," }{XPPEDIT 18 0 "alpha[n];" "6#&%&al phaG6#%\"nG" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 16 "factor(x^4-1,I);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#, $**,&%\"xG\"\"\"^#F'F'F',&F&!\"\"F(F'F',&F&F'F'F'F',&F&F'F'F*F'F*" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 22 "factor(x^3-x^2+2*x-2);" }} {PARA 11 "" 1 "" {XPPMATH 20 "6#*&,&%\"xG\"\"\"F&!\"\"F&,&*$)F%\"\"#F& F&F+F&F&" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 34 "factor(x^3-x^2+ 2*x-2,\{I,sqrt(2)\});" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*(,&%\"xG\"\" \"*&^#!\"\"F&-%%sqrtG6#\"\"#F&F&F&,&F%F&*&F*F&^#F&F&F&F&,&F%F&F&F)F&" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 23 "On peut aussi utiliser " }{TEXT 273 5 "Split" }{TEXT -1 41 " , qui do nne une factorisation compl\350te :" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 46 "with(PolynomialTools,Split):P:=Split(x^4-1,x);" }}{PARA 11 "" 1 " " {XPPMATH 20 "6#>%\"PG**,&%\"xG\"\"\"-%'RootOfG6#,&*$)%#_ZG\"\"#F(F(F (F(F(F(,&F'F(F(!\"\"F(,&F'F(F)F2F(,&F'F(F(F(F(" }}}{EXCHG {PARA 0 "" 0 "" {TEXT 274 6 "RootOf" }{TEXT -1 77 " d\351signe ici toute racine d u polyn\364me _Z\262+1, on peut simplifier l'\351criture en" }}{PARA 0 "" 0 "" {TEXT -1 10 "utilisant " }{TEXT 275 5 "alias" }{TEXT -1 1 ": " }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 30 "alias(alpha=RootOf(_Z^2+1)):P; " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#**,&%\"xG\"\"\"%&alphaGF&F&,&F%F&F &!\"\"F&,&F%F&F'F)F&,&F%F&F&F&F&" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 46 "Pour calculer les valeurs possibles de alpha :" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 28 "allvalues(RootOf(_Z^2+1)); " }}{PARA 11 " " 1 "" {XPPMATH 20 "6$^#\"\"\"^#!\"\"" }}}{PARA 0 "" 0 "" {TEXT -1 0 " " }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 12 "La fonction " }{TEXT 276 5 "ro ots" }{TEXT -1 50 " donne les z\351ros avec leur ordre de multiplicit \351:\n" }{XPPEDIT 18 0 "x^2+1" "6#,&*$%\"xG\"\"#\"\"\"F'F'" }{TEXT -1 22 " n'a aucun z\351ro sur Q:" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 19 "roots(x^2+1); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#7\"" }}} {EXCHG {PARA 0 "" 0 "" {TEXT -1 67 "On calcule ses z\351ros sur le cor ps Q(I) induit par les coefficients:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 15 "roots(x^2+1,I);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#7$ 7$^#!\"\"\"\"\"7$^#F'F'" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 " " 0 "" {TEXT 277 33 "FRACTIONS RATIONNELLES : de type " }{TEXT 278 7 " ratpoly" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 43 "F:=(2*x^2+x-3)^2/(x^4-1);numer(F),denom(F);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"FG*&,(*$)%\"xG\"\"#\"\"\"F*F)F+\"\"$!\" \"F*,&*$)F)\"\"%F+F+F+F-F-" }}{PARA 11 "" 1 "" {XPPMATH 20 "6$*$),(*$) %\"xG\"\"#\"\"\"F)F(F*\"\"$!\"\"F)F*,&*$)F(\"\"%F*F*F*F," }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 12 "simplify(F);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*(,&%\"xG\"\"#\"\"$\"\"\"F(,(*$)F%F&F(F&F%F(F'!\"\"F(,* *$)F%F'F(F(F*F(F%F(F(F(F," }}}{EXCHG {PARA 0 "" 0 "" {TEXT 279 17 "Fac torisation sur" }{TEXT 305 1 " " }{TEXT 280 8 "IR ou C:" }}{PARA 0 "" 0 "" {TEXT -1 21 "factorisation sur IR:" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 13 "factor(F); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#**,&%\"xG\"\" #\"\"$\"\"\"F&,&F%F(!\"\"F(F(,&F%F(F(F(F*,&*$F%F&F(F(F(F*" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 20 "factorisation sur C:" }}}{EXCHG {PARA 0 " > " 0 "" {MPLTEXT 1 0 13 "factor(F,I); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*,,&%\"xG\"\"\"F&!\"\"F&,&F%\"\"#\"\"$F&F),&F%F&^#F&F&F',&F%F&^# F'F&F',&F%F&F&F&F'" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 " " {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 26 "retour \340 la f orme normale:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 20 "normal(%,e xpanded); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*&,**$)%\"xG\"\"$\"\"\" \"\"%*&\"\")F))F'\"\"#F)F)*&F(F)F'F)!\"\"\"\"*F0F),*F%F)*$F-F)F)F'F)F) F)F0" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 " " }}{PARA 0 "" 0 "" {TEXT 281 46 "D\351composition en \351l\351ments s imples sur IR ou C:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT 306 18 "convert(F,parfrac," }{TEXT 308 1 "x" }{TEXT 309 2 ") " }{TEXT -1 74 "d\351compose en \351l\351ments simples la fractio n rationnelle F en l'ind\351termin\351e " }{TEXT 307 1 "x" }{TEXT -1 2 ".\n" }{TEXT 310 18 "convert(F,parfrac," }{TEXT 311 2 "x," }{TEXT 315 1 "\{" }{XPPEDIT 18 0 "alpha[1],alpha[2];" "6$&%&alphaG6#\"\"\"&F$ 6#\"\"#" }{TEXT 313 5 ",...," }{XPPEDIT 18 0 "alpha[n];" "6#&%&alphaG6 #%\"nG" }{TEXT 314 1 "\}" }{TEXT 312 2 ") " }{TEXT -1 76 "autorise Map le \340 d\351composer sur un corps contenant les\n nombres alg\351briq ues " }{XPPEDIT 18 0 "alpha[1],alpha[2];" "6$&%&alphaG6#\"\"\"&F$6#\" \"#" }{TEXT 316 5 ",...," }{XPPEDIT 18 0 "alpha[n];" "6#&%&alphaG6#%\" nG" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 21 "D\351composition sur IR:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 25 "convert(F,parfrac,x); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#, (\"\"%\"\"\"*&F%F%,&%\"xGF%F%F%!\"\"F)*&,&!#7F%*&\"\"&F%F(F%F%F%,&*$)F (\"\"#F%F%F%F%F)F%" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 20 "D\351compos ition sur C:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 23 "convert(F,p arfrac,x,I);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,*\"\"%\"\"\"*&^$#\"\" &\"\"#!\"'F%,&%\"xGF%^#F%F%!\"\"F%*&^$#!\"&F*F+F%,&F-F/F.F%F/F%*&F%F%, &F-F%F%F%F/F/" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 256 "" 0 "" {TEXT -1 19 "Exercice corrig\351 5:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" } }{EXCHG {PARA 0 "" 0 "" {TEXT 284 6 "Ex 5.1" }{TEXT -1 37 ": D\351comp oser en \351l\351ments simples sur " }{TEXT 282 2 "IR" }{TEXT 317 1 " \+ " }{TEXT -1 11 ", puis sur " }{TEXT 283 1 "C" }{TEXT -1 15 " , la frac tion " }{XPPEDIT 18 0 "F:=1/(x^4+1)" "6#>%\"FG*&\"\"\"F&,&*$%\"xG\"\"% F&F&F&!\"\"" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 13 "F:=1/(x^4+1) ;" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"FG*&\"\"\"F&,&*$)%\"xG\"\"%F& F&F&F&!\"\"" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 22 "convert(F,pa rfrac,x); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#*&\"\"\"F$,&*$)%\"xG\"\" %F$F$F$F$!\"\"" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 60 "F n'est pas d \351compos\351e. Voyons les racines du d\351nominateur: " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 19 "\{solve(denom(F))\}; " }}{PARA 11 " " 1 "" {XPPMATH 20 "6#<&,&*$-%%sqrtG6#\"\"#\"\"\"#F*F)*&^#F+F*F&F*F*,& F%#!\"\"F)*&^#F/F*F&F*F*,&F,F**&#F*F)F*F%F*F0,&F1F**&F+F*F&F*F*" }}} {EXCHG {PARA 0 "" 0 "" {TEXT -1 39 "On obtient la d\351composition sur IR par:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 30 "convert(F,parfr ac,x,sqrt(2)); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,&*&,&!\"#\"\"\"*&% \"xGF'-%%sqrtG6#\"\"#F'F'F',(*$)F)F-F'F'F(!\"\"F'F'F1#F1\"\"%*(#F'F3F' ,&F-F'F(F'F',(F/F'F(F'F'F'F1F'" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 38 "On obtient la d\351composition sur C par:" }}}{EXCHG {PARA 0 "> " 0 " " {MPLTEXT 1 0 33 "convert(F,parfrac,x,\{I,sqrt(2)\});" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,**(^$#!\"\"\"\"%#\"\"\"F(F*\"\"##F*F+,(%\"xGF+*$- %%sqrtG6#F+F*F'*&F0F*^#F*F*F*F'F**(^$F&F&F*F+F,,(F.F+F/F'*&^#F'F*F0F*F *F'F**(^$F)F&F*F+F,,(F.F+F/F*F8F*F'F**(^$F)F)F*F+F,,(F.F+F/F*F3F*F'F* " }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }} {EXCHG {PARA 0 "" 0 "" {TEXT 285 6 "Ex 5.2" }{TEXT -1 7 ": Soit " } {XPPEDIT 18 0 "P = X (X-1) (X-2) (X-3)" "6#/%\"PG---%\"XG6#,&F(\"\"\"F +!\"\"6#,&F(F+\"\"#F,6#,&F(F+\"\"$F," }{TEXT -1 2 " ." }}{PARA 0 "" 0 "" {TEXT -1 41 "Montrer que les z\351ros du polyn\364me d\351riv\351 \+ " }{TEXT 286 2 "P'" }{TEXT -1 52 " sont 3 termes cons\351cutifs d'une \+ suite arithm\351tique." }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 45 "P:=X*(X-1)*(X-2)*(X-3):dP:=diff(exp and(P),X);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%#dPG,**$)%\"XG\"\"$\" \"\"\"\"%*&\"#=F*)F(\"\"#F*!\"\"*&\"#AF*F(F*F*\"\"'F0" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 19 "zeros:=[solve(dP)];" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%&zerosG7%#\"\"$\"\"#,&*$-%%sqrtG6#\"\"&\"\"\"#F/ F(F&F/,&F&F/*&#F/F(F/F*F/!\"\"" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 54 "On trie les \351l\351ments de la liste par ordre croissant ," }{TEXT 329 5 " sort" }{TEXT -1 26 " ne fonctionnant pas ici :" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 195 "tri:=proc(L::list)\n local x,y,Z; \n Z:=L;\n for x to nops(Z)-1 do\n for y from x+1 to nops(Z) do\n \+ if evalf(Z[y]-Z[x])<0 then Z:=subsop(x=Z[y],y=Z[x],Z) end if;\n end do;\n end do;\n Z;\n end proc:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 18 "zeros:=tri(zeros);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%&zeros G7%,&#\"\"$\"\"#\"\"\"*&#F*F)F**$-%%sqrtG6#\"\"&F*F*!\"\"F',&F-#F*F)F' F*" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 65 "On calcule les \351carts en tre 2 termes cons\351cutifs , la raison est " }{XPPEDIT 18 0 "sqrt(5)/ 2 " "6#*&-%%sqrtG6#\"\"&\"\"\"\"\"#!\"\"" }{TEXT -1 1 ":" }}{PARA 0 "> " 0 "" {MPLTEXT 1 0 61 "for k to nops(zeros)-1 do print(zeros[k+1]-ze ros[k]) end do; " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,$*$-%%sqrtG6#\"\" &\"\"\"#F)\"\"#" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,$*$-%%sqrtG6#\"\"& \"\"\"#F)\"\"#" }}}{PARA 256 "" 0 "" {TEXT -1 0 "" }}{PARA 256 "" 0 " " {TEXT -1 17 "Travail dirig\351 5:" }}{PARA 0 "" 0 "" {TEXT -1 0 "" } }{EXCHG {PARA 0 "" 0 "" {TEXT 318 7 "TD 5.1:" }{TEXT -1 30 "\nSoit la \+ fraction rationnelle " }{TEXT 287 2 "F " }{TEXT -1 14 "d\351finie par \+ : " }{XPPMATH 20 "6#/%\"FG*(%\"XG\"\"',&*$F&\"\"#\"\"\"F+F+!\"#,&F&F+F +F+F," }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 23 " 1\260 La d\351composition de " }{TEXT 288 1 "F" }{TEXT -1 26 " en \351 l\351ments simples dans " }{TEXT 289 5 "IR(X)" }{TEXT -1 10 " s'\351cr it :" }}{PARA 257 "" 1 "" {XPPMATH 20 "6#>%\"GG,,%\"aG\"\"\"*&,&*&%\"b GF'%\"XGF'F'%\"cGF'F',&*$F,\"\"#F'F'F'!\"\"F'*&,&*&%\"dGF'F,F'F'%\"eGF 'F'F.!\"#F'*&%\"fGF',&F,F'F'F'F1F'*&%\"gGF'F:F7F'" }}{PARA 0 "" 0 "" {TEXT -1 37 " On r\351duit les fractions composant " }{TEXT 290 1 "G " }{TEXT -1 41 " au m\352me d\351nominateur et on identifie les" }} {PARA 0 "" 0 "" {TEXT -1 19 " num\351rateurs de " }{TEXT 291 1 "F" }{TEXT -1 7 " et de " }{TEXT 292 1 "G" }{TEXT -1 28 ". En d\351duire l es valeurs de " }{TEXT 293 13 "a,b,c,d,e,f,g" }{TEXT -1 2 " ." }} {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 32 "2\260 Cal culer la d\351composition de " }{TEXT 294 1 "F" }{TEXT -1 26 " en \351 l\351ments simples dans " }{TEXT 295 4 "C(X)" }{TEXT -1 2 " ." }}} {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }} {EXCHG {PARA 0 "" 0 "" {TEXT 321 7 "TD 5.2:" }{TEXT -1 25 "\nSoit P un polyn\364me de K[" }{TEXT 327 1 "x" }{TEXT -1 35 "] , s'\351crivant s ous la forme : " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#/-%\"PG6#%\"xG- %$SumG6$*&&%\"aG6#%\"kG\"\"\")F'F/F0/F/;\"\"!%\"nG" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 41 "L'algorithme de H\366rner permet d'\351crire P(" }{TEXT 322 1 "x" }{TEXT -1 17 ") sous la forme :" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 11 "" 1 "" {XPPMATH 20 "6# /-%\"PG6#%\"xG,&*&,&*&,(*&,&*&,&*&&%\"aG6#%\"nG\"\"\"F'F6F6&F36#,&F5F6 !\"\"F6F6F6F'F6F6&F36#,&F5F6!\"#F6F6F6F'F6F6%(~.~.~.~GF6&F36#\"\"#F6F6 F'F6F6&F36#F6F6F6F'F6F6&F36#\"\"!F6" }}{PARA 0 "" 0 "" {TEXT -1 0 "" } }{PARA 0 "" 0 "" {TEXT 319 8 "Exemple:" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"QG,,*$%\"xG\"\"%\"\"$*$F'F)\"\"#*$F'F+!\"\"F'F+\"\"\"F." }} {PARA 11 "" 1 "" {XPPMATH 20 "6#>%\"QG,&*&,&*&,&*&,&%\"xG\"\"$\"\"#\" \"\"F/F,F/F/!\"\"F/F/F,F/F/F.F/F/F,F/F/F/F/" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 36 "Ecrire une proc\351dure PolyHor ner(P , " }{TEXT 324 1 "x" }{TEXT -1 25 ") permettant d'\351crire P( " }{TEXT 323 1 "x" }{TEXT -1 21 ") sous cette forme , " }}{PARA 0 "" 0 "" {TEXT -1 31 "P \351tant un polyn\364me donn\351 de K[" }{TEXT 326 1 "x" }{TEXT -1 4 "] , " }{TEXT 325 1 "x" }{TEXT -1 30 " \351tant \+ le nom de la variable ." }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 44 "NB: il est interdit d'utiliser la fonction " } {TEXT 320 6 "horner" }{TEXT -1 11 " de MAPLE ." }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 20 "Grace \340 la fonction " }{TEXT 330 4 "cost" }{TEXT -1 76 " , \351valuer le co\373t en op\351ra tions n\351cessaires pour \351valuer Q et\nPolyHorner(Q," }{TEXT 328 1 "x" }{TEXT -1 42 ") , Q \351tant le polyn\364me donn\351 en exemple \+ ." }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}}}{MARK "2 0" 39 }{VIEWOPTS 1 1 0 1 1 1803 1 1 1 1 }{PAGENUMBERS 0 1 2 33 1 1 }