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" ! #8 8 8 8+ + + + + + + T #9 8= Q5 URV# '2<(),() P8*K+?JD.( T ! 8 #8 8 8 + ∀ ≠ S# = Q5 !" # 3 !TN #8− !N# = Q5 !""UT# !T ! 8 #8 8 8 − ∀ > V# = Q5 T!T # "T" N #8− "!# = Q5 T " " "T" #N # # '2<(),<O() -2<<O()/0 F ()Z?A[<\ N !T # = '2<()E% , N S " ! 8 T 8 8 8 + > − ] Q5 SX NT# = 3 '2<(), S8 3 N " 8 8 8 8 8 − ∀ ≠ 3@ ()^Z[<\ V "S # STS − − + = ] Q5 U_ !XR"# = − '2<()/O$.*K% N T "U ! # 8 8 8 8 8 8 + ∀ ≠ 3@4 ()^Z [<\/0 ! " XR − −+ + = ] Q5 XR"# F N ! T R XT 8 − + = * ! T ! N ! TT 8 7 − − + = #'2<+()^ 88 3@4() N U 7+ 34 ""S # Q5 ! "#8 8= ∨ = '2<++, 88 3@ T! N " N" " 8 8− − + () V 34 "! * ! N "" + = # Q5 "8 8= ∨ = # W F ()Z?A[<\ " " "N " N !T + = + #'2<() ! 8 N " N " 8 8 8 8 − ∀ ≠ # Q5 S V S ! ! #" #N # 8 # F "! "! " ### 8 8 8 8+ = + + + + *K ∗∈ #`@4 N "" !S = # '2<] Q5 V SS = # www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 234554 '2<()E 8 N " 8 # 8 8 8 + > `@4 [<\/0 V X U R U "N N " ++ + + = # Q5 V V !T #" N" N" = # F +∈ * 8 8 # 7 7 > `@ 7 7 + a S R 8 7 2<()b * 7 *K()<34] Q5 V VT T 7 # Y F ()Z?A[<\ N " ! "! ! N − + − − +− = #'2<(),() !!8 N U 8 # N 8 8 8 8 − = − ≠ Q5 U U!" #S # F ()Z?A [<\/0 ! "!V !V − + = + #'2<(), X8 N! " " 8 8− + ] Q5 """S− # F " N S " !"! " !"! ## # 8 8 8 8 8 8= − + − = + + + + '2< X ] Q5 S − # < '2<(), T8 " "! " ! N 8 8 8 8 8= − + + 3@4 " !! T − +− = # Q5 NN" # F ! !! ! R! " ! !! ! " ## 8 8 8 8 8 8 8 = + + = + + + + + #'2< T ] Q5 VX"# F ( ) " ! N " ! ! 8 # 8 8 8 8 88 = − + − ∀ ≠ 5* cd23(C:< 3 Z()] Q5"R()# A1 ).23' 4 p q n(a bx cx )+ + 5670" 7/ .!) k k n n n A , C , P . e@ # 6 < = < = < = < = 6 6 6 6 6 6 6 6 6 8 78 8 78 8 78 8 78 8− − − = = = = + + = + + = + = ∑ ∑ ∑ # # # 8 6 < =6 6 6 6 6 78 8− − = = = ∑∑ *K 8 #6 ∈ '2<(),() 9 * 3@/ ()<7 P " ! ! N #8 8+ + S #9 8= Q5 !VRT# 3 " ! ! " N #8 8+ + S #9 8= Q5 U UT# " ! ! " #8 8+ + !X #9 8= Q5 NUS # " T" N 8 #8 8 8+ − ∀ ≥ " #9 8= Q5 "N #− " T ! #8 8+ − N #9 8= Q5 ! #− W " N U! #8 8+ − U #9 8= Q5 "NU# " N T! #8 8 8+ + + ! #9 8= Q5 ! !# !" S !! 8 #8 8 8 − − ∀ ≠ U #9 8= Q5 "X!TR#− '2<(),<O() -2<<O()/0 F " ! " " ! " " ! 8 8 8 8 8+ − = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + #'2< U ] Q5 U ST = # 3 F ( ) "! 8 # 8 8 8 8 8 = − + ∀ ≠ f+/()E.gO* % 8 3@[ N " !" ++ = # Q5 RU#− '2<() S8 3 ! N ! 8 8 8 8 + − > ]`@4 ()Z ?A[<\ ! " N! " !N U N + + ++ = # Q5 SS"" # www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 234554 F N " N! " N! " 8 8 8 8 8− + = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + #f+/() V 8 3@ 4 !T N! " " N ! " "" " + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + = ⋅ Q5 V !T = − # F ! " " " !S! " !S! " N S S 8 8 8 8 8 8+ + + = + + + ⋅ ⋅ ⋅ + #'2< V ] Q5 V SU"SRV = # W '2<(), ! 8 "" N! # " S 8 8 8 + + + *K ()^Z[ <\/0 N " !S −+ = # Q5 ! "RTV RV = # B1 ).C (p q n p q n(ax bx ) ; a bx cx )+ + + 567DE + h ! ! ! ! 8 7 7 7 7 − − −+ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + *K 5)1#@ 3E() - =<2 -334 ! # @7,3/2(C # 7− ' 3 " S ###6 6 + + i - j2/ 7$ 3 7− * 7+ d 8 7 :O i -/ j *@# `@+() "! 8+ ! "S#'2<(), !"8 ] Q5 ! _ "! # = '2<(), V8 N ! 8 8 8 + *K ()Z?A* 3@4+ () 34! "S] Q5 ! _ "! # = '2<(),() U8 ( ) TN" 8 8 8 = + *K 8 > #`@[<\ /0 ! " ! S RT −+ + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + = # Q5 U S!" #" XR" = # '2<(), ! 8 " 8 8+ 3@4 ()Z?A[<\ /0 ! ! " " N NN N N N ! " SU − − − − + − + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + − = # Q5 ! ! !! #" "" = = # '2<(), ! 8 " N 8 8 8 8 8− > 3@4 ()Z?A* +() 34 " SU− ] Q5 SSTT#− '2<(), ! 8 " 8 8+ 3@4 ()Z?A[<\ /0 ( ) ! ! " " N NN N N N ### ! 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" 8 8 8 8+ = + + ⋅ ⋅ ⋅ + / ∈ * +() !8 8###8 [<\ ! S RV" " + + ⋅ ⋅ ⋅ + = #'2<()K7 +() !8 8###8 ] Q5 <% !"VX" # = F " ! " ! " N 8 8 8 8 + = + + + ⋅ ⋅ ⋅ + #'2<()K7 +() ! "8 8 8###8 ] `@4 ()^Z[<\ " " " ! ! !" !! "T − − − −+ + = ] Q5 <% ! ! V"" U = ⋅ '2<()Z?A[7 ( ! 8+ I()() Z@. PZ34 X !T ] Q5 "! = # I1 !#$' -JK%&#$' G#$ -LM1.% 5).C n(a b) .+ f& 7+ () 6+ # # > < =6 6 6 6 7 − = α β *K 8 α β +()B I#5) BI12<[<\ ( ) 8 < 6 6 6 > = ∈ ∈ ≤ ≤ ⇒ ∈ 6 6 6 7 −⇒ ()12<# '2<() ()Z N N " 8 + 3@4 ()Z?A [<\/0 ( )N " N "X# # # = # Q5 N N !R N #" * R NR " # '2<()BI N ! N! T # " + + `@4 ()Z?A[<\ /0 ! " " N"" − − − ++ + = # Q5 V N " ! ! " #T_ N" N" ⋅ %&DE 1 >N3O PQR%&DHST k k n n n A , C , P # • ' 7− 27/89 8+ : 8− : 8+ ;#; • 5)1?()<* 334# • e$g b7 ! !! 8 6 6 6 6 6 + + − ++ = = * ! ! ! ! # # ! ! 6 6 6 + +=+ + # • h-.B+b,ED. # 8? ⋅ ⋅ ⋅ + + ⋅ ⋅ ⋅ c/?J( (+ (),3@l3$*K8G( (+(),()<l3$, "! 8− *K ! ! ###### 8 8− + www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 23455'4 'b+( ! TT T T #@ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 T" #@ = 3 ! " " T TT T T T" " " #@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 TN #@ = ! ! U UU U US S S #@ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 UT #@ = ! " " ! " ! " ! " ! " ! #@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 " ! " #@ = ! " " " ! " ! " ! " ! " ! " ! " " " #@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 " ! N #@ = W V X U R ! ! ! ! ! ! #@ = + + + + Q5 NUV#@ = " " S ! ! ! ! ! #@ 8 = + + + ⋅ ⋅ ⋅ + Q5 RR" #@ = ! N N T T " R " R" ! " ! " ! " ! "# " # " # " # #@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 " ! ! N !# " @ = − 'b ( ) ( )" !! " ! "" " " "! ! ! !! # ! #" N " ! 6 6 @ 6 + − = − + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + − + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + − + Q5 " " ! @ = + # 'b ! ! ! ! "M#" !"M SM#" ! M " !"M#"M " !SM @ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + ⋅ Q5 " !N" ! " !SM @ − = # L\b+( " ! " " " N " " !N! " !N " !N " !N " !N! # " # N # " !N # #@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + Q5 " !!" !N#" !S#" # # 3 ! " " !N " !N " !N " !N " !N " ! " N " !S @ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ Q5 " !S " " ! " !S @ − = # F< " ! " " " + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + = *K "8 ≥ ∈ # F ()^Z "8 ≥ </G " " " ! ! " " " ! ! " ! ! + + − + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + = ⋅ + + 'b !" !" !"!" !" !N " !N " !S!" !S !!#!" !!#!" !!#!" " !"#" !N " !N#" !S @ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + ] Q5 !!" !N ! !N" @ = # F< "8 8 ∀ ≥ ∈ E ! ! " "### ! − −≤ − # '2<()Z?A[<\/G(/m " " " " " " " " " " !T !V " " " " "#N #N #N #N " #" ! 6 6 − −+ + ⋅ ⋅ ⋅ + + ⋅ ⋅ ⋅ + + = + # Q5 U = # A1 ).25670+'%+C %UDE )1>N3O +'%H7 • $ + ()/ ?K D. > 1 " " "!8 "8 N8 ###8 ! 8 " 8 ###8 - =<1 " " " 8 ###8 N8 "8 ! 8###8 " 8 ! E7#L6+A # 6 6 - !# 6 6 6 6 7 − − # • n?A.+.= + `?K!#f&P ! ! " " " ! ! 8 8 8 8 8 − − − −+ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + # + `?K"#o7/ <*@/?D ! ! ! " " ! " ! " ! # 8 8 8 8 − − − − − −+ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + − + + `?KN#Fd+%* bD.^* /03 /@* # F< !8 8 ∗∀ ≥ ∈ 2 ! ! " " N N k!#N "# #N N# #N # #S # − − −+ + + ⋅ ⋅ ⋅ + = F< !8 8 ∗∀ ≥ ∈ 2 ! ! ! " N N S S !" " " " #N # − − − − −+ + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + = '2< 8 +∈ [ ! " " N N S " " !" ! " ! " ! " ! " !"#" N#" S#" " !#" " T + + + + + +− + − + ⋅ ⋅ ⋅ + + = Q5 ! "# 'b @ +?JD.( www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 23455&4 " S V ! ! ! ! ! S U !" " #@ = + + + ⋅ ⋅ ⋅ + Q5 RR! #" #@ = 3 ! " " " " " " " N " ! #@ = + + + ⋅ ⋅ ⋅ + Q5 " ! !#" #@ = ! " " V " X" X " X " X " X " X" U " X " V " #@ = + + + ⋅ ⋅ ⋅ + + Q5 " V" R#" #@ = F N " " 8 8 8 8 ∗ = − ∈ #L\2<() V 88 3@4 () ^Z[<\ /G ! ! " " N N !!#" "#" N#" !"#N − − − −+ + + ⋅ ⋅ ⋅ ⋅ ⋅ + = # Q5 V V V!"" 8 # F ! ! RR "! RU RR ! ! 8 8 8 8 8 − = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + + # 'b ! RR " !! RU RR! #" RR #" " #" ! #" !@ = + + ⋅ ⋅ ⋅ ⋅ ⋅ + + + # Q5 " !@ = # F " !S " " !S! " " !S! N 8 8 8 8− = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + # 'b ! ! " !S" N " !T@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ + ] Q5 " !SN ""#"@ = # 'b " S " !S" !S " !S " !S " !SN T " !T#@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + # Q5 " !N! U#"@ = # 'b+3 " S V " !S" !S " !S " !S " !S" N ! X = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + # Q5 " !N! X #" " = # 1>N3O +'%H7 • $ + () / ?K D. > 1 !#"8 "#N8 ###8 ! − - =< 1 ! 8###8 "#N8 !#" − E786+ # 6 6 6 − - ! #6 6 6 − • n?A.+.=F+3?K=?A^?/ <7.!# 'b " ! " " " N " " V " " X" X " X " X " X " X! " N " V " X@ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ + + # Q5 " T" X#" U#" # F< " ! " " " " !" " " !N " !!" !N " N " !N " !N! " " !" " !N " !N#" !S#" # + + ⋅ ⋅ ⋅ ⋅ ⋅ + + = F 8 ∈ [<\/0 N N NT8 N# ! " + = ≥ − − L\b " " " N " S "" # N S ! # # @ = − + − ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + − ] Q5 N @ = # B1 ).25670+'%+C %UDE • $5)6+ ! ! ! 6 6 6 7 6 + + − ⋅ + KV3' 7W#$1 • n?A.+.= + `?K!#f&P ! ! ! ! # 8 A 8 8 A 8A A − − −+ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + + `?K"#o7b.m*@*K$* 3 ! ! ! ! # 7 7 8 A A8 8 8 A 8A A A8− − − + = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + ∫ ∫ ! ! " ! ! !! ! ! " 77 8 A 8 8 8 A A 8 + + − − + ⇔ = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + ⋅ + + + `?KN#Fd 8 8 8 7 A .lD.^* /03 # F+3 +<p/1*0(agb.m 'b ! " ! ! ! " N ! @ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ ⋅ + Q5 !" ! ! @ + − = ⋅ + 3 'b " N ! ! "" ! " ! " ! " N ! @ + − − − = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ + Q5 ! !N " ! @ + + − = ⋅ + 'b ! ! " # " " ! ! @ − = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ + Q5 !N ! " ! @ + − = ⋅ + www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 2345B%4 " S V " ! ! N T " R " ! " ! " ! " ! " ! " ! " ! " ! " S V " ! @ − − − − = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ Q5 " !! " !!N ! " S "" − − ⋅ ! " " N N ! ! ! ! #" #" #" #" # " N S ! @ = + + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + Q5 !N ! 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" " SU# + + + ⋅ ⋅ ⋅ + = F " !" " "S! " "S! 8 8 8 8 8+ + = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + #'b S # '2<() S8 P N ! N 8 8 8= − − 83@ 8 +∈ [ " " !V T − ++ + = # F ()Z?A[<\.?A2 ! " ! "TT# −+ + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + = L\2<() !S8 " ! N # 8 8 8= + + '2<(), !N8 ( ) N N"! # " ! S 8 8 8 + + + *K ()^Z/[<\ .?A2 N " !S −+ = # F () Z ?A [ <\ /0 ! " ! "TT# −+ + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + = L\ 2< () !S8 " ! N # 8 8 8= + + '2<() ! 8 N S ! 8 8 8 8= − + − #`@4 ()Z?A /[<\.?A2 ! " N " ! " U" ! " ! " ! " ! " ! " !# + + + − + + + + ++ + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + = − www.MATHVN.com - Toán Học Việt Nam www.DeThiThuDaiHoc.com !" !" #$%&''&'%% () *+ $*,)-. / %&001%1 2345BB4 '2< 8 +∈ [ " " " ! " " ! 8 8 8 8 8+ + = + + + ⋅ ⋅ ⋅ + * ! " "" " U! + + ⋅ ⋅ ⋅ + = ] '2< () , T8 " " ! " ! N # 8 8 8 8 8= − + + `@ 4 () Z ?A[<\/0 " !! T − +− = # h ! ! V # 6 6 8 8 8 8 8= − = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + L\b+,3 ! 8" " = + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + 3@4 ()Z?A[<\/0 " !" U − = # '2<()BI + ( r ( )XN !V N+ # 3r ( )RNN "+ # r ! T! T N + # r ! T" " N − # L\2<()K7 !N !N !" !! ! " !" !N " ! # 8 8 8 8 8 8 = + = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + + F " ! " ! N 8 8 8 8 8= + = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + # L\ 2< () K 7 3@ ()Z?A[<\/0 ! N " ! "X" " "### " −+ + + = # 'b " S V U ! V" !S " !S " !S " !S " !S # = + + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + 'b ! " " !N " !N " !N " !N " !N M !M "M " !NM @ = + + + ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ + ⋅ 'b " N " !N" !N " !N " !N!#"# "#N# " !"#
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