( Thi gian lm bi 90 pht ( không k thi gian giao đ)
!"
#
!
$
"%
&
$
&
&'()#*+
,
&
-,
&
#, ,
&
&
,",
,
&
!
./+0/1
,
&
-&!
# ","%,,"
!
23#*+45
x x x x
x x x x
+ −
− −
÷ ÷
− +
6789:;#*+4
# '()#*+4
&
2374<2=>34?5%7@)AB0*7;42CDB0*7E+
FG?HA
2+7I+4?2DB06JK
# L6JK4?2D#84A5!7
&
2374<2FMN4C=>,84O@)PB0*7;4<CDB0
*7E+FGOHP
2+7I*7DE+FGOH4<
# 2+7I+4D<OB063
74<2966+4D<OB06FM
!"#$%&'
( )$*#
+,-.
!
!"5!-
&
!-
5"
&
$ !
#
!
$
"%
&
$
&
5
$ &
x x
+ −
&'()#*+!
,
&
-,
&
5
&
&, ,
&
&
"&, ,
&
5&
&
&,
&
5&
&
,
&
# , ,
&
&
,",
,
&
5
, ,
&
&
,
&
,
-
,-,
5,
&
&
,
&
!
&!
Q!
!
&!
!
&!
+,
./+0/1
,
&
-&!
5 ,
&
-!
&
5 , ! ,-!
#","%,,"
5", %,",
5", %,
5",&! ,
!
&!
&!
&!
&!
,-
RS
x x
x x
x
+ ≠ ⇔ ≠−
− ≠ ⇔ ≠
≠
#
( ) ( )
( )
( )
& & & &
x x x x
x x x x
x x
x x
x
x
− + − +
Α =
÷ ÷
÷ ÷
− +
+
=
−
+
=
−
Q!
&!
&!
+,-
" ?6FT
S+4?2DA45A2CA?5AD
UK,+4?2DB06#60
&!
&!
&!
?6#604?2D
µ
VH
=
o
UK,+4?2DB06JK
?D57
4D5W7
P6JK4?2DB0%W5$W7
&
&!
&!
C&!
C&!
C&!
+,-
?6FT
/01231/4-5671289:
OPB0=>#6;74<2
5XOP42OPB0=>#6;7
4<2
O042
⊥
4<
V
4<2FMN4
5XOP
⊥
4<
P3OD
⊥
4<NP
PD5PO
5X4<B0=>;3NYDO
UK,DE+FGOH4<
#/71231/;<12=72>?4@/A1/=/B
P45P<ZPD5PO
5X4D<OB06#60
4<
⊥
OD+7[
5X4D<OB063
:32>??C-D9EF12A=/A=72>?4@/A1/
G9H12
?634D<OB06FM\5X4<5OD
\5X4<542F6OD542#I&OP
UK,74<2FM/N46+4D<OB06
FM
&!
&!
&!
&!
&!
&!
C&!
C&!
2
O
<
D
4