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` C "D 6E " ) * +,- # $% & ? "N & " K "N & :; B : ' " L :; :-5 \" : A @ \ 1" : " \ " :1 \ " G "# " + D 6$Z • 6> < " " J G " - "- + " D + " 6> $, > &H J & H A = 6$Z 1- ? 6$Z e€ " B K " $,- " % _ Y C # # = +z $,- " & 1j "< I " " -= "7 -= KB Khèi r¾n, c¸c c¸ch céng trõ khèi r¾n + / $ B =# F% L !" M "D0 A @ G - Q & E# : " " W \ : XW89898X "D 6E 6r ? " "3 & I h" B : d " W " X "D 6E 6r 62: e 2- + o d " -M K- -M E & I h" - " -M & E# F & ( F " " W \ : XW89898X "D 6E 6r ? " "3 & I h" B : d " W " X "D 6E 6r 62: " K & + o d " -M K- -M E & I h" - " -M & ( & * " m -#"W " # - "X "3 ` 6= " s m -#"6= K & -#1 A" W U - 1X := e 6= " s # W - "X -M # "D 6E 6r & * n & "J " m -#"W " # - "X "3 ` 6= " s m -#"6= K & -#1 A" W U - 1X := e 6= " s " \ " W - "X -M " \ " "D 6E "3 6= " s " ( G# & N 1# " " \ 1# W89898X "3 A" WU - 1X := e u & +s " " " \ 1# W89898X "3 k ) P & I h" I h" -C & -C A" WU - 1X \ " := e ? *" [3 B A" WU - 1X \ " : := e ? := e " & := e # f- , % := e & :N J B Q F% L !" N A " O& • / & "P& & -M # f- K " e |# e = < ` e o 6$^ "{ y" e o # f- K " e |# e " & Y C # -" [ 6b# " G "# D 62- "$^ ‚ - F- " m -" + " -" G# - A + d" # H /-" W/X T " G " :T "1 D 62- "$^ "-5# " ! fE" 6[ e5" " g C dC " "< :M " & -M A @G - 1m " " " G " :T "1 D " A ! " W4 - " \ m " 1- X -M m " 1- " # W8X * "*# ? $% " & "*#9 " & B ! " " 6$Z ƒ G "# " D 6$Z ƒ dC + + & "s A @G - 1m " + " G " :T "1 D " A -1 \ + "R:T " / WG" " # - " \ -1X D 6-[ " i" " ( " J Wm # - " \ -1X D 6-[ " - " ( " J \ + "- W\ - X * o ? = 6> :%- -M ] - 6> :L- 6-[ "J B „-M e -[ 1{ " [ -C +h" " [ Q-5 C " -1 - " 6b- 12 6$Z " [ -C :M " e - e o :> e i" -1 - " @+ \ -1 - Q-5 C " " " 6b- 12 " " -= " [ -C " e |" e i" " " @+ \ " Q-5 C " -1#1- e - :-5 K t " & I " -= 6$^ 6-[ " # ) y" 1j 6- ] 6-[ " i" +K " ) * +,- 6$Z " ) ] 6-[ " ( - @ " # ) y" 1 +,- 6-[ & ! - " +- @ # 6-[ " # ) y" 6- ] Q " 1- W! - " 11\" # X D # N -I 6-[ " # ) 62- 6- ] = { D R:T " " 62- 6$^ = 6> :L- 62- "$^ -M d 1" " 62- 6$^ = 6> :L- C A " $, 6* S -1 = 6> " J S :; 6-[ " # ) 62- 6- ] 6-[ " i" +K " ) * +,- < " ) - @ " 62- " ) * +,- # $% & ` v 1b -C K +K 6- ] 6-[ 6$^ = 6> :L- s y ! - " +- @ # W89898X /0 " 62- 1 +,- " # ) /0 +K 6- ] 6-[ 6$^ = 6> :L- s y ! - " +- @ # W89898X 0S9S/ "$% "{ /0 62- "$^ ] " J :i" e‡ =# % '5; ] c -\ A # "" " A G " :T " D 62- "$^ ! : R:T " d 1" S -1 - @ / -1 -1 S -1 # - "1X = 6> 6-[ "J ] = { D R:T " " J ] 6$^ = 6> :L- 62- "$^ -M d 1" " J ] 6$^ = 6> :L- C " " A " $, 6* - @ "J ] 1 +,- # $% & ` v 1b -C K +K 6- ] 6-[ 6$^ = 6> :L- s y ! - " +- @ - "-1 W89898X / -1 " J ] 1 +,- " J / +K 6- ] 6-[ 6$^ = 6> :L- s y ! - " / -1 W89898X -19S -1 "$% "{ / -1 ] 62- "$^ " E" 62- "$^ e = A # "" G " :T "1 D 62- "$^ G# -\ 1" # - " D 6-[ ˆ " i" G# -\ 1" 1"- "- # - " D 6-[ " i" G# -\ # - " D 6-[ ˆ " G# -\ 1"- "- # - " D 6-[ " G# -\ # - " W "- X D 6-[ ˆ " 7: G# -\ 1"- "- # - " W "- X D 6-[ " : n =# 5; @ "< f = 62- "$^ " e o c -\ A # "A G " :T "1 D 62- "$^ l-[ & E# U " ! ?U !B " : \ @1 ? B W X 12 K : \ ?‰‰‰B W X 12 E" : \ + ? B W X 12 "N A-1" : "@ @1 ? B e f = K A-1" : "@ ?‰‰‰B e f = E" A-1" : "@ + 1? B e f = "N l-[ +s " s U " ! ?U !B " : \ -" 12 62- "$^ " \- W u8X * U " " :T "1 " #- V W0X ] 62- "$^ " # - " \ = 6> -[ " i" ` " J G # - " -1 \ " "= 6> -[ " - ` " J =# c -\ TB Nguån s¸ng vÏ 3D :( $ dC - " - @U d- " F% &U E Š @ "< ˆ 1= ,d- " 1= ˆ 1= = e-[ ˆ 1= ! - " - " ˆ 1= "… G# " - " ˆ 1= -5 " # < +A-1" " - " ˆ 1= ? = 1= " " Z-B cJ = e-[ D- 1= k " 1-" 6-[ r $Z 6E 1= G 1" 1" " 6b- K 1y ˆ 1= *" [" 6b- +> " ] 91 |# ˆ 1= VW %F &U E 0% d- " "( ˆ 1= k " 1-" $Z 6E 1= c -\ = 6> +> " ˆ 1= m " - " "- W "X +> " ˆ 1= :; C + W %F &U E 0% "$^ "{ ˆ 1= # - " - " l = :-C" "1# " +Y 1= \\ +Y 1= Z c -\ m " - "" "W "X +> " J "-( m " - " "- W "X +> " ˆ 1= nVW %F &U E < "$^ "{ ˆ 1= # - " - " c -\ m " - " - "RW "X +> " J "-( m " - " - "URcW "X +> " ˆ 1= g" " = 1= " " Z- / i" -( E# E- " " e-[ -Z " E# " & D +K y +h" -C ( = 62- "$^ - @U c " " " h" -C 6> K : c -\ 1v 6b- " i" ` +h" -C @ "< +h" -C ,A # - " "< +h" -C ,- "' +h" -C * 1_ 4E# 1" = e-[ i" -C G " D i" -C * 1_ ‹y i" -C 62- "$^ "" D 62- "$^ y i" -C Q k D 62- "$^ " K Q y " ,# Q[ ' = @ " $ +-C = i" -C * 1_ ! +- @ " $, i" -C c " - -1" 1= i" -C d-: -1" e-[ i" -C k # " D +h" -C m # " :b i" -C +K " $ +-( F% " D #& B Q'1 \ &D # #- " B :- " " 6b- $Z 6E = 1= o" $Z U \ "" 6b- $Z 6E 1= # f < U 11 " 6b- 6E = 1# " 6b- 6E " 2" U \ "" 6b- 6E # f -5 ? r "= J +,- e-[ ! " " B Q # # =# f # +K +h" -C B r " [ -C e e-[ "o :* # " 9# " " %F- ? Y u c -\ +K c " - "( i" -C r 12 ` = " i" - \D f :-" # K ` +h" -C Q = C p" ^ ] , *1 ,-= ?@ " -5" 6." - @ AA - - @ A " G " :T "1 D 62- "$^ " A-1" !R- "1 ! S F-1" d-# 4- R\\ H W /-"X = { D : > [ & W +> " J "-( +K 6-[ & m " " " # - " W 9wX m " # - " W 9wX u )$ ' ] 6-[ & ] J "-( ? J "-( 6> K 89898 $ = 6> :L- " ‡ D !R- "9 "B - m " \ /0 # W8X * ] "' " # ) /0 ? # < +- :-5 6b- "' O8 65 O8B d{ D " \ m " - /0 # \ / -1 W8X * ] " " # ) /0 ?" "' " J # < +- :-5 6b- "' P8 65 P8B $ ' ] J "-( ] 6-[ & ? +,- e f = e o 6b- B - m " \ /0 # W8X * ] "' " # ) /0 ? # < +- :-5 6b- "' O8 65 O8B d{ D " \ m " - /0 # \ / -1 W8X * ] " " # ) /0 ?" "' " J # < +- :-5 6b- "' P8 65 P8B P; "' " 6b- e f = "' J "-( 65 6-[ & 6ˆ " Z[ ] & -5 # 2- f @ " " -1" WXe f = * " [ = 6> :; " $, +,- " > "' u ? u u N e f = -C " K B & -5 # 2- f T 1" " W 888 X "-( { * " [ = 6> :; " $, +,- " > "' u ? u u N "-( { -C " " y" " $, +K ? " ) * +,- # $% & B 6[ -,- < # < +& Q e " WR\\X \ = 6> " y" " $, Q " y" \\ e o Y " y" m WA-1" \ " "X W X e f = " "' J "-( > $% " y" -I 6-[ & +K J "-( " > J "-( *" [ Y " $, 6[ r P m " ( ] Q dC "o :* - @ G G A t8 ? G A t ? G A t ? G A t ? y" u u u u " $, e e ] "& ?f E $^ ] P8 B e-[ G "o K = :M " B "o :* " e o " [ -C = < m 4- - "B "o :* " < * K M 4d- B -2 C B ? 6> B " * K +j < * K M O ^B " *1 + = >? '? ? - @ U U B D "( ` " = L J G " U Q C !# \ ? - @ U ! \ 1B +'