{VERSION 3 0 "IBM INTEL NT" "3.0" } {USTYLETAB {CSTYLE "Maple Input" -1 0 "Courier" 0 1 255 0 0 1 0 1 0 0 1 0 0 0 0 }{CSTYLE "2D Math" -1 2 "Times" 0 1 0 0 0 0 0 0 2 0 0 0 0 0 0 }{CSTYLE "2D Comment" 2 18 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 } {CSTYLE "2D Output" 2 20 "" 0 1 0 0 255 1 0 0 0 0 0 0 0 0 0 }{CSTYLE " " -1 256 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 257 "" 0 14 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 258 "" 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 }{CSTYLE "" -1 259 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE " " -1 260 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 261 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 262 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 }{CSTYLE "" -1 263 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 264 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 265 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 266 "" 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 }{CSTYLE "" -1 267 "" 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 }{CSTYLE "" -1 268 "" 0 14 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 269 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 270 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 271 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 272 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 273 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 274 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 275 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 276 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 277 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 278 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 279 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 280 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 281 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 282 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 283 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 284 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 285 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 286 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 287 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 288 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 289 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 290 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 291 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{CSTYLE "" -1 292 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }{PSTYLE "Normal" -1 0 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 1 1 1 }1 1 0 0 0 0 1 0 1 0 2 2 0 1 }{PSTYLE "Heading 1" -1 3 1 {CSTYLE "" -1 -1 "Times" 1 18 0 0 0 1 2 1 2 2 2 2 1 1 1 }1 1 0 0 8 4 1 0 1 0 2 2 0 1 }{PSTYLE " Maple Output" -1 11 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 1 1 1 }3 3 0 0 0 0 1 0 1 0 2 2 0 1 }{PSTYLE "Maple Plot" -1 13 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 1 1 1 }3 1 0 0 0 0 1 0 1 0 2 2 0 1 }{PSTYLE "Normal" -1 256 1 {CSTYLE "" -1 -1 "Times" 1 18 0 0 0 1 2 1 2 2 2 2 1 1 1 }3 1 0 0 0 0 1 0 1 0 2 2 0 1 }{PSTYLE "" 0 257 1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 }0 0 0 -1 -1 -1 0 0 0 0 0 0 -1 0 }} {SECT 0 {EXCHG {PARA 256 "" 0 "" {TEXT -1 73 "Lab 1: Direction Fields, Solving First Order ODE's and Plotting Solutions" }}{PARA 257 "" 0 " " {TEXT -1 42 "Click on the + symbol to open that section" }}{PARA 0 " " 0 "" {TEXT 272 78 "Evaluate all input (in red) by placing the cursor anywhere in red and enter. " }{TEXT -1 1 " " }}}{SECT 1 {PARA 3 "" 0 "" {TEXT -1 62 "1. Solving, and plotting solutions of, Differential Equations" }{TEXT 260 23 ": The \"dsolve\" command." }}{PARA 0 "" 0 " " {TEXT -1 71 "Differential equations and initial value problems are s olved using the " }{TEXT 271 6 "dsolve" }{TEXT -1 10 " command. " }} {PARA 0 "" 0 "" {TEXT -1 7 "usage: " }}{PARA 0 "" 0 "" {TEXT 257 7 "ds olve(" }{TEXT -1 0 "" }{TEXT 258 1 " " }{TEXT -1 25 "the differential \+ equation" }{TEXT 266 1 " " }{TEXT -1 24 ", the dependent variable" } {TEXT 267 4 ") " }{TEXT -1 2 "or" }}{PARA 0 "" 0 "" {TEXT -1 0 "" } {TEXT 261 10 "dsolve( \{ " }{TEXT -1 0 "" }{TEXT 262 45 "a differentia l equation, initial condition(s)" }{TEXT -1 0 "" }{TEXT 263 1 " " } {TEXT -1 0 "" }{TEXT 264 4 "\}, " }{TEXT -1 22 "the dependent variabl e" }{TEXT 259 2 " )" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 " " {TEXT -1 31 "I start most sections with the " }{TEXT 274 7 "restart " }{TEXT -1 55 " command to clear all previous variable definitions by " }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 8 "restart;" }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 265 9 "Example 1" }{TEXT -1 71 ": Find the general solution to the first order differential equ ation: " }{TEXT 283 8 "y' = 3 y" }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 46 "sol1 := dsolve(diff(y(x),x) = 3 * y(x), y(x));" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%%sol1G/-%\"yG6#%\"xG*&%$_C1G\"\"\"-%$expG6#,$F) \"\"$F," }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 12 "Notice: The " } {XPPEDIT 18 0 "_C1;" "6#%$_C1G" }{TEXT -1 34 " indicates an arbitrary \+ constant. " }}}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 256 9 "Example 2" }{TEXT -1 39 ": Consider the initial value problem " }{TEXT 275 8 "y' = 3 y" }{TEXT -1 5 " , " }{TEXT 276 12 "y(0) = 1 /2. " }}{PARA 0 "" 0 "" {TEXT -1 1 "(" }{TEXT 277 1 "a" }{TEXT -1 21 " ) Find the solution. " }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 58 "sol 2 := dsolve(\{diff(y(x),x) = 3*y(x), y(0) = 1/2\}, y(x));" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%%sol2G/-%\"yG6#%\"xG,$-%$expG6#,$F)\"\"$#\"\" \"\"\"#" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 94 "Notice: Maple automati cally solves for the arbitrary constant based on the initial condition . " }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 1 "(" }{TEXT 278 1 "b" }{TEXT -1 41 ") Plot the solution from x = 0 to x = 1. " }}{PARA 0 "" 0 "" {TEXT -1 96 "First we want to access the right hand side (rhs) of sol2 and make it a function of x called y2." }}{PARA 0 "" 0 "" {TEXT -1 22 "This is done with the " }{TEXT 279 7 "unapply" }{TEXT -1 5 " and \+ " }{TEXT 280 3 "rhs" }{TEXT -1 24 " commands as follows. " }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 27 "y2 := unapply(rhs(sol2),x); " }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%#y2GR6#%\"xG6\"6$%)operatorG%&ar rowGF(,$-%$expG6#,$9$\"\"$#\"\"\"\"\"#F(F(F(" }}}{EXCHG {PARA 0 "" 0 " " {TEXT -1 49 "You can plot the solution from x = 0 to x = 1 by " }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 84 "plot(y2(x),x=0..1,labels=[\" x\",\"y2(x)\"],title=\"The solution to y' = 3y, y(0) = 1/2\");" }} {PARA 13 "" 1 "" {GLPLOT2D 400 300 300 {PLOTDATA 2 "6&-%'CURVESG6$7S7$ \"\"!$\"1+++++++]!#;7$$\"1nmm;arz@!#<$\"1h&3XH%)yL&F+7$$\"1LL$e9ui2%F/ $\"1gX!p&))R]cF+7$$\"1nmm\"z_\"4iF/$\"1z`$G5lP-'F+7$$\"1mmmT&phN)F/$\" 1RB>Jp_CkF+7$$\"1LLe*=)H\\5F+$\"1;4C8U&)\\oF+7$$\"1nm\"z/3uC\"F+$\"1%Q T)pBIpsF+7$$\"1++DJ$RDX\"F+$\"1sDH'H-2t(F+7$$\"1nm\"zR'ok;F+$\"1TK6T/r Q#)F+7$$\"1++D1J:w=F+$\"1ulmc%4$y()F+7$$\"1LLL3En$4#F+$\"1R:)HB\\-P*F+ 7$$\"1nm;/RE&G#F+$\"1*Hj'fbgC**F+7$$\"1+++D.&4]#F+$\"1%HMq#=!)e5!#:7$$ \"1+++vB_BO\"Fco7$$ \"1LLLLY.KNF+$\"1\\SlCLiU9Fco7$$\"1++D\"o7Tv$F+$\"1bio*y4?a\"Fco7$$\"1 LLL$Q*o]RF+$\"1&pc#f;oN;Fco7$$\"1++D\"=lj;%F+$\"1*oVFk8]u\"Fco7$$\"1++ vV&R#*[l8z>Fco7$$\"1LLeR \"3Gy%F+$\"1c&fjo\"\\*4#Fco7$$\"1nm;/T1&*\\F+$\"1,(=\"=)GvB#Fco7$$\"1m m\"zRQb@&F+$\"1t\"=N=G0R#Fco7$$\"1***\\(=>Y2aF+$\"1FI&fN2A`#Fco7$$\"1m m;zXu9cF+$\"1bM&**>rYp#Fco7$$\"1+++]y))GeF+$\"1@)>rfmM(GFco7$$\"1**** \\i_QQgF+$\"1i:#*ew&)fIFco7$$\"1***\\7y%3TiF+$\"1k&)yJ5q^KFco7$$\"1*** *\\P![hY'F+$\"1D![d " 0 "" {MPLTEXT 1 0 16 "subs(x=1,y2(x));" }}{PARA 11 "" 1 " " {XPPMATH 20 "6#,$-%$expG6#\"\"$#\"\"\"\"\"#" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 53 "and get a numerical value to 6 significant digits by \+ " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 11 "evalf(%,6);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#$\"'G/5!\"%" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 80 "The % symbol references Maple's last output. Not necessa rily the line above it." }}{PARA 0 "" 0 "" {TEXT -1 1 "(" }{TEXT 282 2 "d)" }{TEXT -1 74 " Find the value of x for which y2 is 100. Ie. So lve y2(x) = 100 for x. " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 22 "solve(y2(x) = 100, x);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#,$-%#lnG 6#\"$+##\"\"\"\"\"$" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 11 "eval f(%,6);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#$\"'5m " 0 "" {MPLTEXT 1 0 36 "ode 3 := t*diff(y(t),t)+2*y(t)=2*t^2;" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#> %%ode3G/,&*&%\"tG\"\"\"-%%diffG6$-%\"yG6#F(F(F)F)F-\"\"#,$*$)F(F0\"\" \"F0" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 28 "and then solve it using t he " }{TEXT 273 6 "dsolve" }{TEXT -1 8 " command" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 36 "sol3 := dsolve(\{ode3,y(1)=2\}, y(t));" }} {PARA 11 "" 1 "" {XPPMATH 20 "6#>%%sol3G/-%\"yG6#%\"tG,&*$)F)\"\"#\"\" \"#\"\"\"F-*&F.F.*$)F)\"\"#F.!\"\"#\"\"$F-" }}}{EXCHG {PARA 0 "> " 0 " " {MPLTEXT 1 0 27 "y3 := unapply(rhs(sol3),t);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%#y3GR6#%\"tG6\"6$%)operatorG%&arrowGF(,&*$)9$\"\"#\" \"\"#\"\"\"F0*&F1F1*$)F/\"\"#F1!\"\"#\"\"$F0F(F(F(" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 85 "plot(y3(t),t=.5..3,labels=[\"t\",\"y3(t)\"] ,title=\"A plot of the solution to Example 3\");" }}{PARA 13 "" 1 "" {GLPLOT2D 400 300 300 {PLOTDATA 2 "6&-%'CURVESG6$7Z7$$\"1+++++++]!#;$ \"1++++++Dh!#:7$$\"1n;a8ABO^F*$\"109]$HSy\"eF-7$$\"1LL3FWYs_F*$\"133WF ]*[`&F-7$$\"1**\\iSmp3aF*$\"1JGrTSxt_F-7$$\"1mm;a)G\\a&F*$\"1Ro#)QrPK] F-7$$\"1+DJ&p)*>y&F*$\"1:$HCwURl%F-7$$\"1L$ek`o!>gF*$\"1BWwQUX@VF-7$$ \"1*\\(=n$ycG'F*$\"1(oy\\vzS*RF-7$$\"1nm\"z>)G_lF*$\"1C>,:1_3PF-7$$\"1 omm\"Hl1#oF*$\"1@9OXZ#pX$F-7$$\"1nmT&QU!*3(F*$\"1#=lrjygB$F-7$$\"1+voH R9ctF*$\"1meLI*[D/$F-7$$\"1L$eRZXKi(F*$\"1um^'p3<(GF-7$$\"1n;z>,_=\")F *$\"1Nw$Qyp`g#F-7$$\"1**\\7G$[8j)F*$\"1l;;()*=fQ#F-7$$\"1n;z%*frh\"*F* $\"1*[Jb#*Qn?#F-7$$\"1,]ilFQ!p*F*$\"1^=5J=!p1#F-7$$\"1LL3_\"=M-\"F-$\" 1)>YD)3$e&>F-7$$\"1n;/wfJr5F-$\"1mV)GI+3)=F-7$$\"1++D\"eP_7\"F-$\"1i_7 oXw<=F-7$$\"1++v$f!Qz6F-$\"1Yg_(zxQx\"F-7$$\"1++v=ubJ7F-$\"1^'GD8Mtu\" F-7$$\"1n\"zW(*Q*y7F-$\"1!)*oC\\*)[t\"F-7$$\"1LL3F-GN8F-$\"1?4S\"*zxK< F-7$$\"1LLLe'3IQ\"F-$\"1-9hzGeS=F-7$$\"1 +v$f)[$Hf\"F-$\"1-i!pRn)f=F-7$$\"1M$ek`1lk\"F-$\"1$z^Oc'z3>F-7$$\"1Le* [.-dp\"F-$\"1(fL#o#o$f>F-7$$\"1n;/Egw[?F-7$$\"1n\"z%*f% )Q!=F-$\"1FwU')4(z3#F-7$$\"1+voza'=&=F-$\"1K'>)Rk4_@F-7$$\"1n;zWho.>F- $\"1%QWBO:fA#F-7$$\"1++]i>Ad>F-$\"1(ycjUIpI#F-7$$\"1+]i:jf4?F-$\"1Tm#H zl1R#F-7$$\"1+DJ&>r-1#F-$\"1N%>^6RdZ#F-7$$\"1+]P4q`;@F-$\"1hU5YhquDF-7 $$\"1LL$eM%4n@F-$\"1R>Yt%\\vm#F-7$$\"1++v$4v5A#F-$\"1kGFD6lqFF-7$$\"1n \"zWn*)*pAF-$\"1Pq!fUFv'GF-7$$\"1++DJiYBBF-$\"1pf1kG5xHF-7$$\"1Lek.Nyt BF-$\"1)[!ypYi$3$F-7$$\"1+Dc^&zjU#F-$\"1A&*4AQW)>$F-7$$\"1LL3-=!yZ#F-$ \"1]%[ZQqSJ$F-7$$\"1+D\"G8O;`#F-$\"1<&e#***H'QMF-7$$\"1nmm\"*\\[$e#F-$ \"1t0)=$o$>c$F-7$$\"1n;aQz]OEF-$\"1a'G\"QzP\"p$F-7$$\"1MekG=4*o#F-$\"1 #)>!eXTI#QF-7$$\"1++]i4TPFF-$\"1&R1A/&)o%RF-7$$\"1M$3F9!z#z#F-$\"1\\u9 _S:#4%F-7$$\"1nmmT>KUGF-$\"1-%Hd)pV F-7$$\"1+voa-oXHF-$\"1dl`[iQ6XF-7$$\"\"$\"\"!$\"1nmmmmmmYF--%'COLOURG6 &%$RGBG$\"#5!\"\"Fi\\lFi\\l-%&TITLEG6#QDA~plot~of~the~solution~to~Exam ple~36\"-%+AXESLABELSG6$Q\"tFg]lQ&y3(t)Fg]l-%%VIEWG6$;$\"\"&Fb]lFg\\l% (DEFAULTG" 1 2 0 1 0 2 9 1 4 2 1.000000 45.000000 45.000000 0 }}}} {EXCHG {PARA 0 "" 0 "" {TEXT -1 7 "Again, " }{XPPEDIT 18 0 "_C1;" "6#% $_C1G" }{TEXT -1 34 " indicates an arbitrary constant. " }}}{PARA 0 " " 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 270 9 "Example 4" }{TEXT -1 64 ": Find and plot the solution to the initial value problem y' = " }{XPPEDIT 18 0 "(3*x^2+4*x+2)/(2*(y-1));" "6#*&,(*&\"\"$\"\"\"*$%\" xG\"\"#F'F'*&\"\"%F'F)F'F'\"\"#F'F'*&\"\"#F',&%\"yGF'\"\"\"!\"\"F'F3" }{TEXT -1 11 ", y(0)=-1. " }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 54 "ode4 := diff(y(x),x) = (3*x^2 + 4*x + 2)/(2*(y(x)-1));" }}{PARA 11 " " 1 "" {XPPMATH 20 "6#>%%ode4G/-%%diffG6$-%\"yG6#%\"xGF,*&,(*$)F,\"\"# \"\"\"\"\"$F,\"\"%F1\"\"\"F2,&F)F1!\"#F5!\"\"" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 29 "dsolve(\{ode4,y(0)=-1\}, y(x));" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#/-%\"yG6#%\"xG,&\"\"\"F)*$-%%sqrtG6#,*\"\"%F)*$)F' \"\"$\"\"\"F)*$)F'\"\"#F3F6F'F6F3!\"\"" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 82 "Again, Maple solves for the arbitrary constants based on the initial conditions. " }}{PARA 0 "" 0 "" {TEXT -1 55 "Define y4 as the right hand side of the previous output" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 24 "y4 := unapply(rhs(%),x);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%#y4GR6#%\"xG6\"6$%)operatorG%&arrowGF(,&\"\"\"F-*$-%% sqrtG6#,*\"\"%F-*$)9$\"\"$\"\"\"F-*$)F6\"\"#F8F;F6F;F8!\"\"F(F(F(" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 82 "plot(y4(x),x=-3..1,labels=[ \"x\",\"y4\"],title=\"A plot of the solution to Example 4\");" }} {PARA 13 "" 1 "" {GLPLOT2D 400 300 300 {PLOTDATA 2 "6&-%'CURVESG6$7L7$ $!1+++q)>'**>!#:$\"12mk'Q&[A&*!#;7$$!1+++o7z))>F*$\"1aA\"p_tjT(F-7$$!1 +++lE'z(>F*$\"1\\8w.)*R!R'F-7$$!1+++jS8n>F*$\"1;\"f(eG%yg&F-7$$!1+++ga Ic>F*$\"1%)*R=#G2a\\F-7$$!1+++b#[Y$>F*$\"1WauUixtQF-7$$!1+++]5*H\">F*$ \"1H\"QS1jE)HF-7$$!1+++I\"3&H=F*$\"1&Gs'GAJ?X!#<7$$!1+++Twp`%= v?x!=\"F-7$$!1+++P;bj;F*$!1l;YxS&[m#F-7$$!1+++Zh=(e\"F*$!1z5E=OfeOF-7$ $!1+++G\\N)\\\"F*$!1PT![LlGf%F-7$$!1+++ZUs>9F*$!1s93a%y[E&F-7$$!1+++GR XL8F*$!15*yS%43peF-7$$!1+++$=/8D\"F*$!1pYpL&G\"RjF-7$$!1+++U&*el6F*$!1 $[jT/?0u'F-7$$!1+++Wn(o3\"F*$!1BaX+e#Q/(F-7$$!1+++eV(>+\"F*$!1,PGyjz9t F-7$$!1+++5k%y8*F-$!1:P]]^G[vF-7$$!1+++IB:q$)F-$!1AsE!# =$!1uc3%f%G!***F-7$$\"1,+++#G2A)FQ$!1mT>%eMT/\"F*7$$\"1+++I)G[k\"F-$!1 #p>-)>k%4\"F*7$$\"1+++?\"yh]#F-$!1vwZj#oY:\"F*7$$\"1+++q)fdL$F-$!1f`)o 7F*7$$\"1+++?q7%=%F-$!1 " 0 "" {MPLTEXT 1 0 16 "# end of section" }}}}{SECT 1 {PARA 3 "" 0 "" {TEXT -1 55 "2. Plotting Direction Fields: The \"dfieldplot\" command." }} {PARA 0 "" 0 "" {TEXT -1 0 "" }{TEXT 291 11 "Example 1: " }{TEXT -1 0 "" }{TEXT 292 7 "y' = 3y" }}{PARA 0 "" 0 "" {TEXT -1 62 "First we defi ne the differential equation and give it a name. " }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 31 "ode1 := diff(y(t),t) = 3*y(t); " }}{PARA 11 " " 1 "" {XPPMATH 20 "6#>%%ode1G/-%%diffG6$-%\"yG6#%\"tGF,,$F)\"\"$" }}} {EXCHG {PARA 0 "" 0 "" {TEXT -1 65 "The command for plotting direction fields is in a library called " }{TEXT 257 7 "DEtools" }{TEXT -1 86 " in order to access this program we must first load this library. To d o this, use the " }{TEXT 258 4 "with" }{TEXT -1 9 " command " }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 14 "with(DEtools):" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 40 "The command to plot direction fields is \+ " }{TEXT 259 10 "dfieldplot" }{TEXT -1 15 " with the usage" }}{PARA 0 "" 0 "" {TEXT -1 1 " " }{TEXT 256 10 "dfieldplot" }{TEXT -1 81 " (diff erential equation, dependent variable, t range, y range, labels and ti tles)" }}{PARA 0 "" 0 "" {TEXT -1 11 "for example" }}}{EXCHG {PARA 0 " > " 0 "" {MPLTEXT 1 0 75 "dfieldplot(ode1,y(t),t=0..10,y=-3..3,title= \"Direction Field for y' = 3y\"); " }}{PARA 13 "" 1 "" {GLPLOT2D 400 300 300 {PLOTDATA 2 "6&-%'CURVESG6]dl7%7$$!+x-]]%F-F+7$$\"+A8.GUF- F17$$\"+%>&4'G%F-F67%7$$\"+1rL>ZF-F+7$$\"+7rMaZF-F17$$\"+%)4T7[F-F67%7 $$\"+'*GlX_F-F+7$$\"+-Hm!G&F-F17$$\"+unsQ`F-F67%7$$\"+'oo>x&F-F+7$$\"+ #pyp!eF-F17$$\"+kD/leF-F67%7$$\"+wWG)H'F-F+7$$\"+#[%HLjF-F17$$\"+a$e8R 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You mu st work in a group of 2-4 members and use the lake denoted on your cov er sheet. You have to use Maple to generate the graphs requested in p arts d and f. You may use Maple to check your answers on the other pa rts but I want to see how the answers were derived for parts a,b,c, an d e. " }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 " " }{TEXT 285 53 "- Five of the points will be based on presentation. \+ " }}{PARA 0 "" 0 "" {TEXT 286 105 "- You can print Maple graphs right \+ from Maple or export the graphs into another document and print that. \+ " }}{PARA 0 "" 0 "" {TEXT 287 102 "- I only want to see the graphs ... . NOT all of the commands that went into generating the graph!!! " } }{PARA 0 "" 0 "" {TEXT 288 80 "- To enter the text editor in Maple, cl ick on the \"T\" button from the tool bar. " }}{PARA 0 "" 0 "" {TEXT 289 72 "- To get a Maple prompt, click on the \"[>\" button from the t ool bar. " }{TEXT -1 0 "" }}}}{MARK "3 1 0" 317 }{VIEWOPTS 1 1 0 1 1 1803 }