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{SECT 0 {EXCHG {PARA 0 "" 0 "" {TEXT 211 34 "ENGI. 3424 Engineering M
athematics" }}{PARA 0 "" 0 "" {TEXT 210 13 "Example 4.6.2" }{TEXT 211 
3 "   " }{XPPEDIT 18 0 "Typesetting:-mrow(Typesetting:-mi(\"\"), Types
etting:-mrow(Typesetting:-mi(\"\"), Typesetting:-mrow(Typesetting:-mi(
\"f\", italic = \"true\", mathvariant = \"italic\"), Typesetting:-mo(
\"⁡\", mathvariant = \"normal\", fence = \"false\", sepa
rator = \"false\", stretchy = \"false\", symmetric = \"false\", largeo
p = \"false\", movablelimits = \"false\", accent = \"false\", lspace =
 \"0.0em\", rspace = \"0.0em\"), Typesetting:-mfenced(Typesetting:-mro
w(Typesetting:-mi(\"x\", italic = \"true\", mathvariant = \"italic\"),
 Typesetting:-mo(\",\", mathvariant = \"normal\", fence = \"false\", s
eparator = \"true\", stretchy = \"false\", symmetric = \"false\", larg
eop = \"false\", movablelimits = \"false\", accent = \"false\", lspace
 = \"0.0em\", rspace = \"0.3333333em\"), Typesetting:-mi(\"y\", italic
 = \"true\", mathvariant = \"italic\")), mathvariant = \"normal\")), T
ypesetting:-mo(\"=\", mathvariant = \"normal\", fence = \"false\", sep
arator = \"false\", stretchy = \"false\", symmetric = \"false\", large
op = \"false\", movablelimits = \"false\", accent = \"false\", lspace \+
= \"0.2777778em\", rspace = \"0.2777778em\"), Typesetting:-mrow(Typese
tting:-mi(\"\"), Typesetting:-mrow(Typesetting:-mn(\"2\", mathvariant \+
= \"normal\"), Typesetting:-mo(\"⁢\", mathvariant = \"n
ormal\", fence = \"false\", separator = \"false\", stretchy = \"false
\", symmetric = \"false\", largeop = \"false\", movablelimits = \"fals
e\", accent = \"false\", lspace = \"0.0em\", rspace = \"0.0em\"), Type
setting:-msup(Typesetting:-mi(\"x\", italic = \"true\", mathvariant = \+
\"italic\"), Typesetting:-mn(\"3\", mathvariant = \"normal\"), supersc
riptshift = \"0\")), Typesetting:-mo(\"+\", mathvariant = \"normal\", \+
fence = \"false\", separator = \"false\", stretchy = \"false\", symmet
ric = \"false\", largeop = \"false\", movablelimits = \"false\", accen
t = \"false\", lspace = \"0.2222222em\", rspace = \"0.2222222em\"), Ty
pesetting:-msup(Typesetting:-mi(\"xy\", italic = \"true\", mathvariant
 = \"italic\"), Typesetting:-mn(\"2\", mathvariant = \"normal\"), supe
rscriptshift = \"0\"), Typesetting:-mo(\"+\", mathvariant = \"normal\"
, fence = \"false\", separator = \"false\", stretchy = \"false\", symm
etric = \"false\", largeop = \"false\", movablelimits = \"false\", acc
ent = \"false\", lspace = \"0.2222222em\", rspace = \"0.2222222em\"), \+
Typesetting:-mrow(Typesetting:-mn(\"5\", mathvariant = \"normal\"), Ty
pesetting:-mo(\"⁢\", mathvariant = \"normal\", fence = \+
\"false\", separator = \"false\", stretchy = \"false\", symmetric = \"
false\", largeop = \"false\", movablelimits = \"false\", accent = \"fa
lse\", lspace = \"0.0em\", rspace = \"0.0em\"), Typesetting:-msup(Type
setting:-mi(\"x\", italic = \"true\", mathvariant = \"italic\"), Types
etting:-mn(\"2\", mathvariant = \"normal\"), superscriptshift = \"0\")
), Typesetting:-mo(\"+\", mathvariant = \"normal\", fence = \"false\",
 separator = \"false\", stretchy = \"false\", symmetric = \"false\", l
argeop = \"false\", movablelimits = \"false\", accent = \"false\", lsp
ace = \"0.2222222em\", rspace = \"0.2222222em\"), Typesetting:-msup(Ty
pesetting:-mi(\"y\", italic = \"true\", mathvariant = \"italic\"), Typ
esetting:-mn(\"2\", mathvariant = \"normal\"), superscriptshift = \"0
\")), Typesetting:-mi(\"\")), Typesetting:-mi(\"\"));" "-I%mrowG6#/I+m
odulenameG6\"I,TypesettingGI(_syslibGF'6%-I#miGF$6#Q!F'-F#6'F+-F#6%-F,
6%Q\"fF'/%'italicGQ%trueF'/%,mathvariantGQ'italicF'-I#moGF$6-Q0&ApplyF
unction;F'/F:Q'normalF'/%&fenceGQ&falseF'/%*separatorGFD/%)stretchyGFD
/%*symmetricGFD/%(largeopGFD/%.movablelimitsGFD/%'accentGFD/%'lspaceGQ
&0.0emF'/%'rspaceGFS-I(mfencedGF$6$-F#6%-F,6%Q\"xF'F6F9-F=6-Q\",F'F@FB
/FFF8FGFIFKFMFOFQ/FUQ,0.3333333emF'-F,6%Q\"yF'F6F9F@-F=6-Q\"=F'F@FBFEF
GFIFKFMFO/FRQ,0.2777778emF'/FUFeo-F#6*F+-F#6%-I#mnGF$6$Q\"2F'F@-F=6-Q1
⁢F'F@FBFEFGFIFKFMFOFQFT-I%msupGF$6%Fen-F\\p6$Q\"3F'F@/%
1superscriptshiftGQ\"0F'-F=6-Q\"+F'F@FBFEFGFIFKFMFO/FRQ,0.2222222emF'/
FUF_q-Fcp6%-F,6%Q#xyF'F6F9F[pFhpF[q-F#6%-F\\p6$Q\"5F'F@F_p-Fcp6%FenF[p
FhpF[q-Fcp6%F^oF[pFhpF+F+" }{TEXT 211 0 "" }}{PARA 0 "" 0 "" {TEXT 
211 36 "Minimum at (0, 0, 0),   Maximum at (" }{TEXT 207 1 "-" }{TEXT 
211 17 "5/3, 0, 125/27), " }}{PARA 0 "" 0 "" {TEXT 211 18 "Saddle poin
ts at (" }{TEXT 207 1 "-" }{TEXT 211 3 "1, " }{TEXT 207 1 "-" }{TEXT 
211 13 "2, 3)  and  (" }{TEXT 207 1 "-" }{TEXT 211 9 "1, 2, 3)." }}
{PARA 0 "" 0 "" {TEXT 211 72 "Click on the graph, select the \"rotate \+
the plot\" icon from the tool bar " }}{PARA 0 "" 0 "" {TEXT 211 71 "an
d drag the graph in order to view the surface from another direction."
 }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 103 "plot3d(2*x^3 + x*y^2 + \+
5*x^2  + y^2, x=-2..1, y=-3..3, view=-5..25, axes=boxed, orientation=[
-135,50]);" }}{PARA 13 "" 1 "" {TEXT 212 0 "" }{GLPLOT3D 724 545 545 
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