!"
"#$
!!"#$$%&'(&(
()%&'()*+,-.')/+/01)23/43*+),"-)
.!/!0123'#4567+8.(
9:;4.(9#4;2<=. >!
'44?02$@2.2A(.(9:
. 02!# B
CD
,:-'7 +E((!F&G'H#0#I
:D'D$J,bt ñng thc9HK
"567$
8"9':;3<'=>?@+?=A$(không m rng)
LM!8BC8
!"#$(0
≥
N
%&$
O
'
'
+
'.e
J"9':;3<'=>?KD3-+LL)$
!"#$(fg\
∈
5
h
%&$
P\ S \
+ ≥ +
+,-$TDUVW&'(.(VNZV\
"MN#$
8"O3<P9':;3<'=>?@+?=A$
!324"$
;$-.(Bi
\
i
O
jji
5!+7
$-bbi
5!+7!!
$ - $ - b b ik
\ O
5 5 5≥
P\S
L(;B
\ O
\ \ \ \
l
5 5 5 5
= + + +
mH@0('. G!B
\ O \ O
\ O
\ O
\ \ \ \ \ \
\ \ \ \
S
α
678$
rGJ#H@026Ivv53w
0264Obx&x'K%,;!%B
P S
Y
9
α α
+
=
LD'>Bs
!
]PpYqpS
!(&
mH@0`(&.B
P5S
?Z.HDUVW&'(.pVqp]qVp
]pV(qV(Nt
≃
CQ
R
EES
E"O3<P9':;3<'=>?KD3-+LL)$
!324"$
CI#7!)DA(D1{@:;<
!=>(-(d
LE$B!VOPDSVyONP.!SD'
N
V\NP!u
O
SiVz|NNP.!S
678$
L026
N
mH@0`3B
O
\ \ O
5 5
+ ≥ +
O
!
\ \ O
5 5
⇒ + = +
T;B
N
(&
P S
T Vt lýK thut
Trưng THPT Tôn ðc Th#ng.