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℡ ℡℡ ℡M MM M ! R!U1VRV1WXXY!V1X!X1 1RW7!X!1"""1QO1WX M MM M3Z,1 6%5?9: 6%5?9:6%5?9: 6%5?9: 1& !W !!" !W !!"!W !!" !W !!" /"234#563&&-78,-,0 http://kinhhoa.violet.vn ! KA:@[\A5F\D]? KA:@[\A5F\D]?KA:@[\A5F\D]? KA:@[\A5F\D]?^5KL??5@]_@[I ^5KL??5@]_@[I^5KL??5@]_@[I ^5KL??5@]_@[I CP?,.)0&&,%`1 CP?,.)0&&,%`1CP?,.)0&&,%`1 CP?,.)0&&,%`1 RP/M RP/MRP/M RP/M P+%1N)`M P+%1N)`MP+%1N)`M P+%1N)`MN8a(PP PP P • +%3#M ( ) ϕ ϕ ϕ ϕ − ∆ = = ∆ ∆ − ∆ /& • +%M ( ) ω ϕ= 1+%3b3% &1 3P% 3P%3P% 3P% 1N)`M 1N)`M1N)`M 1N)`MN8a( PP PP P • %)03b3%%))%) 3b3%)&M ( ) γ ω ϕ= = P P P P? ?? ?*,.&, *,.&,*,.&, *,.&, 7 77 7 M MM M ?* ?*?* ?* ?*8 ?*8?*8 ?*8 ω ω γ= + c ω = = + c ω= ϕ ϕ ω γ= + + c ϕ = = + + c ϕ= ( ) ω ω γ ϕ ϕ− = − ( ) − = − ω= = γ = γ= %'M = + = + r r r UP?,M UP?,MUP?,M UP?,M dP dPdP dP,.&,)0.*)0)%) %1 dP dPdP dP,.&,)0.$%&,/(- )%8)%%',%/1 dP dPdP dP e!, γ ω e!,.&,8 f!, γ ω f!,.&, 81 dP dPdP dP J !"#$$%&' ( ϕ π http://kinhhoa.violet.vn 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ CCP:/ CCP:/CCP:/ CCP:/7 77 7g,0:/ g,0:/g,0:/ g,0:/7 77 7?*3b)0&,%` ?*3b)0&,%`?*3b)0&,%` ?*3b)0&,%` RP:/N RP:/NRP:/N RP:/N )`I )`I)`I )`I1 11 1PM PMPM PM/;8/&,/)3b 9/),1 )$ ϕ ϕ= = r ur N /'3 )hP 1 dP dPdP dP?,/$&,%/1 Pg,0:/M Pg,0:/M Pg,0:/M Pg,0:/M dP dPdP dPI%&,/h R /)&,$/8#: R ih R 18 R e!1j/h /)&,$(-`*: iY h 18 f!1 dP dPdP dP:.'$/:i: R d: ih R 18 R Yh 18 ⇒ I%: e !)&,$ I%: f !)&,$ I%: i !)$*&,;&,) )%$*. UP?*3b)0&,%`M UP?*3b)0&,%`MUP?*3b)0&,%`M UP?*3b)0&,%`M:%)0&,%`* 3b#.``(%/'3b!M = ∑ O OO OP?,M P?,MP?,M P?,M dP dPdP dP%))0&,%`/k8/&,$/$*& &,1 dP dPdP dP%))0&,%`#k'/%',%)&,-/ )&,1 CCCP* CCCP*CCCP* CCCP*7 77 7$%*)0 $%*)0$%*)0 $%*)07 77 7I</ I</I</ I</7 77 7$*3b.&1 $*3b.&1$*3b.&1 $*3b.&1 RP*)$%*M RP*)$%*MRP*)$%*M RP*)$%*M* /.;/1j%*/)`9'$% /)1 iej)$*/#)$**/*$%*1 P PP P/*)0#4`3*M * * * * * * * * * + + + = + + + + + + = + + + + + + = + + + 3P 3P3P 3P+-)%)8#%4#*)b*% 4)1+-)08#;3#*).b)1 PI</M PI</M PI</M PI</M' /((/)8/*)1 j*)(-,*)(-,.&,&&*1 UP$ UP$UP$ UP$*3b.&M *3b.&M*3b.&M *3b.&M$.)$*,.&,)$* ,.`%1 = ∑ = ⇔ ∑ = ⇔ ∑ = ∑ ur r 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ C+P:&91 C+P:&91C+P:&91 C+P:&91 RP RPRP RP :&9M :&9M:&9M :&9MI%$%/ )0//;&9) ,.`%#&9C CC C//;&9) ,.&,M $ $ +( , ∑ N)`M$1 P1 P:&9(%)0 P:&9(%)0 P:&9(%)0 P:&9(%)0 &,)%4M &,)%4M&,)%4M &,)%4M P+8#<,)M P+8#<,)MP+8#<,)M P+8#<,)M Ci1_ 3P+8#;,#2M 3P+8#;,#2M3P+8#;,#2M 3P+8#;,#2M +( ,- P+/ P+/P+/ P+/8 88 8 $%/:&,/M $%/:&,/M$%/:&,/M $%/:&,/M +( , 8P+/8 8P+/88P+/8 8P+/8 $%/: $%/:$%/: $%/:&,&M &,&M&,&M &,&M +( , * P+8#;&,&*M P+8#;&,&*MP+8#;&,&*M P+8#;&,&*M +( ,- . U UU UP:&9)0 P:&9)0P:&9)0 P:&9)0 &, &,&, &, ∆ 3%$#N$*)%4PM 3%$#N$*)%4PM3%$#N$*)%4PM 3%$#N$*)%4PM C ∆ iC d18 1 /$%/)08 88 8/$)*- %4 )∆ +M +M+M +M:&9&, ∆ &R/M C ∆ iC d18 1/ = + , , , 0 * ∆ ⇔ = + = + = OP6#3,.&,M OP6#3,.&,MOP6#3,.&,M OP6#3,.&,M + ( + = +P:/1 +P:/1+P:/1 +P:/1 RP`2M RP`2MRP`2M RP`2M:///3b9&9) ))%1 1(+ P`/,3%*/M P`/,3%*/M P`/,3%*/M P`/,3%*/M3%*/ ∆ )0 ∆ 3b./8/*)%, .M 1 1(2 2( 1 ∆ ∆ ∆ ⇔ = ∆ UP UPUP UP`/3/M `/3/M`/3/M `/3/MI%./8/*)N, )P3b$*#/)N,)P31 .M ( ) ω ω = ⇔ = ⇔ = = = 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ +CP)0&,&%`M +CP)0&,&%`M+CP)0&,&%`M +CP)0&,&%`M •345678945:;<=5 = = ∑ ∑ 8 88 8 l ll l • >$67?@$A,$$?,B67C$&6DE$45 67 ∑ R R R RR R R R 8 ? 8 ?8 ? 8 ? l i ) i ) l i ) i )l i ) i ) l i ) i ) FG" H,>$% !67D HI J %&6E$K, • L ( + ω FG"+%&,M,N:O$P$QRS •!! L ( T ,I H + ω P`/,3%M P`/,3%M P`/,3%M P`/,3%M3%*)0&,&R$ ∆ 3b*/88/*)0$%,1 ω ω ∆ = − = +CCP&-/8)/M +CCP&-/8)/M+CCP&-/8)/M +CCP&-/8)/M /81 /81/81 /81 /1 /1/1 /1 4 ϕ +%) +% ω % % j%/ :&9C CC C h :/: / ;(, r r :/i ω 1C / L , = &, ω = 6#3 U , = ∑ r r 6#3M 2 + = ∑ `/3/ , = ∑ r `/3/M + = ∑ `/,3%*M ∆ = `/,3%*M ∆ = *`/3 *`/3*`/3 *`/3 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ " #$%$&'()*+, '($ /01($234,567-38159$$:0; )*+,4,&9( $<VW"$AOX5:?)K $<#2:$Y<K%&/Z)D6,/<P$$EM9$80 /Z) P PP P["%KY/\%]$^ 3P 3P3P 3P3Y, !"$B PE$Y/\%]$^ $<3_5,:%K,4\]:$`AZ;a".;aVW, P PP PT$^ 3P 3P3P 3P[ !"#$$^ $<2:RN #EO.,/<bD"*)4\Z;A*Z; VWR:@ P PP PT$5:RN^ 3P 3P3P 3PJ:&;< PK,&$A;A5N_$5,$?,8,c&:)) E?\%a7<4 $<2K,5,,:Y:P$*D./Z)7<6,/<b[ $K/\%]$Vd$ P PP PT$5,K,^ 3P 3P3P 3P2K, !"$B"#$$^ $<"eS,$?,B,S;,:&,Q5 P PP P>$:&P$6EM9$$?,X$ PK,EM^J$ $A;AEM^ 3P 3P3P 3P>$:&P$6EM9$$?,X$ PK,EM^J$ $A;AEM^3%P5:$9$A&"N"#$$^ 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ = $<=2:$Y7<Q5P$$EM9$[.) !./ P PP PT$5Y%&"$B^ 3P 3P3P 3PI6"#$$X%&"$B^ P PP PI6f#$5Y]$$#$$(D.)%&"$B^ $<>2RN7<]B, #D:EO0,Jf))%]$4 B,.,Z) G]$,$?,,&%P5$$ PK,&$A;A8DWR:@ P PP PG5RN 3P 3P3P 3P3"] #$ ! P PP PG#$$? $<?G]$%a7<RS(,:&60Dg/Z)D$./Z) & # ,ϕ ( P PP P3 #,)h !,i]$ϕ ,R 8"$BN"$b/ _^G#$$?,&"^ 3P 3P3P 3P3A#$$?,&" #,cϕ(D.ϕ ,R ^ )*+,56$(+@8 $<A?*( (( (M @M @M@M @M)0//*$%%.)*%* $*8#%,.$%*1 M MM M?),)3%888/(3%8,$*% ,.$%*1 ?M ?M?M ?M?),)3%88/(3%,%,. $%*1 M MM M?*@)1 $<+%%',%%.,.$*M @M @M@M @M?')*)))%1 M MM M?'%))%1 ?M ?M?M ?M?')))%1 M MM M?'%)))%1 $<#?*M @M @M@M @Mj%*))%8#)&,81 M MM Mj%))%8#)&,81 ?M ?M?M ?Mj%*))%*#)&,81 M MM Mj%8))%*#)&,81 $<,.&,8M @M @M@M @M%8%))%1 ?M ?M?M ?M%`*1 M MM M+%`*1 M MM M %))%`*1 $<:)0&,&1:.)&,$_#M @M @M@M @M%k/)_1 ?M ?M?M ?M%8,/)_1 M MM M%k/`)_1 M MM Mk/`)_1 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ > $<:)0&,&%`)%β$*.19%,.&, )/M @M @M@M @M1 M MM MI81 ? ?? ? M MM M?81 M MM M%1 $<"?*1,.&,)0&%`.)M @M @M@M @M&,$1 M MM Mg,$$1 ?M ?M?M ?M?)%1 M MM M@)?1 $<=?*(1 @M @M@M @M+%)%//;,.&,)01 M MM M/)%/%1 ?M ?M?M ?MI%)0&,#%$*.1 M MM MI%)0&,$*#)%,.1 $<>:&-,**;'m*1I%$*(#$ &(-,.%n @M @M@M @M?,.1 ?M ?M?M ?M?,.&,1 M MM M?,./$*1 M MM M?,.)&,)`%1 $<??9')'.%*(M%))0&,& %`k111111111111111111111111.;/)&,1 @M @M@M @M% ?M ?M?M ?M'/*)&,-1 M MM M+% M MM M'/%',%)&,1 $<#Aj _"]kN"#$$&")K,Ml?/<b5 ,X$?, !$b/ _$ P^ @M @M@M @Mk(.m0H /D) $k(.H0m /D) M MM Mk(m.H0H /D) &k(m.m0m /D)n $<#o:RN/<bN",$b/ _$ PP$$./Z) D6D "]<5,$?,2B&:RN%&%&π/Z)&0. G"]52&"#$$?, %& @M @M@M @M (0. H . ϕ D) $ ( H . /D) π ϕ 4 M MM M ( H . /D) ϕ π. & (0. Hp H0*D ϕ D)n $<##j:$?&"Bb67,Q@^ @M @M@M @M$"&;< PbK,q]"n M MM M2$$?,B67C6]$,r$#$$?, ?M ?M?M ?M2$$?,B67C$]$,r$#$$?, M MM Msq]"5:$?,B67%&: #K,8,BQ $<#I67/<b,Q@2$?,B67EM8,BQ @M @M@M @MT$$A;AC$bP$?n M MM MT$"&;<d_$ PK, ?M ?M?M ?MT$"&;< PbK,q]" M MM MT$$A;A%P_$ PK, $<#>$67$A9$b,Q@^G]$,$?,2B67 @M @M@M @MIS_$$A;A%MC PP$S_6&%PEM9$n M MM MIS_$;:;A%M P&"K,q]"&t "$A9$; _S_ 6 ?M ?M?M ?MI6/&$`%u6P$#$$ M MM MT$;:;A&%PE$2&<Q 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ ? $<#:)0&,&)%$*.))%33b$* ()%k/)M @M @M@M @M M MM M ?M ?M?M ?M M MM M a $<#"'vEw@&")KCD"?/<b567 ,Q@^ @M @M@M @MT%&&,)6$N"#$$ M MM MT$%&8)/ _ ?M ?M?M ?MG":O)$v$&6%&8)/ _n M MM MI6%&&,)6XN"#$$ $<#=JKB^3$P$67EMbD,$?,2B67 @M @M@M @M$ PK,t "$A9$6b; _ M MM M$;:;A&%PE$$?,2&/#$%]$<Qn ?M ?M?M ?M$$A;At "$A9$6b%P M MM M6/&$$A9$E$$?,2&/#$RQ $<#>J"x@6N"#$$5,:RN hT !5:RN"l#$$?%& @M @M@M @Mp/ $/ M MM M/ n &0/ $<#?eS67,Q@J;:$?B^ @M @M@M @MG"C,#$$D:$?,567 !v8 M MM MyC,#$$?,D:$?,567C6/&$n ?M ?M?M ?MyC,#$$?,D:$?,567C6 M MM MyC,#$$?,D:$?,567C$ $<A:2&,82M(Q(%R!8a(1Q( 2-&,3bM @M @M@M @M./ )/ $./&./ $<,.&,))%)%(*,,./ 8M @M @M@M @Mω(mD./Z)Fγ(Dz/Z) $ ω(mD./Z)Fγ(mDz/Z) M MM Mω(D./Z)Fγ(Dz/Z) & ω(mD./Z)Fγ( $<#J"x@6N"#$$5,:RN hI6 5:RN"l#$$?%& @M @M@M @M/Z) $D./Z) M MM MD./Z)n &Dg./Z) $<2?6,/<b @M @M@M @M$K, $6K, M MM M6K,&$K, &O6& $%&K,n $<2?/<b @M @M@M @M$/ _ $6/ _ M MM M6/ _&$/ _ &O6&$%&/ _n $<I67R,Q@P$$$:@/ _&EM9$GOX ?567%& @M @M@M @M6,/<b $s/<b M MM Mb &$A9$bn $<"J;:$?BG"?567,Q@,$$?,5 67 @M @M@M @MC $C$b M MM Mb?B:q]" &b?"C,t;wn $<=j _5"]kN"#$$&")K,Ml,?6,/< b !$b/ _^ @M @M@M @Mk(.m0H / $k(.H0m / M MM Mk(m.m0m / &k(m.H0m / EFGHBI # J # > FBI " EFGHBI # J # > FBI " 9 9 : : & & $ $ ; ; " " < < = = * * > > ? ? @ @ = = # # A A B B =C 1>+DDD7E.+ A $<>JKB>$,67,Q@,$$?,B6b @M @M@M @M )6 $$ &$ PK,n $<?2:RN/<bEM6<[$KD]6/Z)T ,&:RN !"$Kf%& @M @M@M @M/ )/ ${/ n &/ $<AJKB>$67,Q @M @M@M @M?56%&6,/<E$$K,n M MM M6?/<P$6K, ?M ?M?M ?M$EM9$&E:EM6$A9$b M MM M6N"$b/ _K,|N"/X]$)56 $<267b,Q@J:$?,B6:Q:E"l-E: 3]$% !&")K`%uP$-^ @M @M@M @MJE| $I6 M MM MT$ &T$ PK,n $<#:34&,))% !8a(#30&,81JV(34 8/1J%)-&,34/M @M @M@M @MURV) M MM MWUQ) ?M ?M?M ?MXOQ) M MM MR ") $<>$,$#5,xx$b/&$8*Z0$b/&$E$,;aG`)6/&$5$?,,a $E$,%& @M @M@M @M 0 * ) { $ & z KL $<2:RN/<b"0)64\Z;a%B*zZ;a I65$?,2c&:RN)E$4 !$K%& @M @M@M @Mpπ/Z) )π/Z) $π/Z) &0π/Z) $<:430,*#3$9U !1=,. 8(*,%4/*!Va(1)`9*&,-/ %*)%',%3b%4/M @M @M@M @M !a( M MM MRWa( ?M ?M?M ?MR a( M MM MVa( $<"2:RN #EO.,/<b"0)64\Z;a %B*zZ;aT$ PK,5$?,2c&:RN)E$4 !$K%& @M @M@M @M.gDp/Z) n $zDg/Z) M MM Mp*Dz/Z) &{zD./Z) $<=2$AYxX$A9$bQ $Rf53x@6N"#$$"c B[5Y""l:%& @M @M@M @M*Dg. n M MM MgD*. ?M ?M?M ?M.Dg. M MM MpD ) ω Z) } ~ o • . . D. D. * J