!""#"$%"#
#!&'!
Câu I (2 đim) (&)
*
*y x x mx= − +
+,
, -))./01&1234&)5
m =
, 67-!489:&)+,;:.1&.:<=!9>9
!?!+@,A
' x y
− − =
Câu II (2 đim)
,%-BC!6
) + , ) + , )
D * E
x x x
Π Π
+ + + = −
,%-/7BC!6
(
)
F
!
x x+ + ≥
!
x
Câu III (1 đim) GGBH
xdx
I
x x
=
+ + −
∫
Câu IV (1 đim) (6IB=!JK(LMJNKN(NLN;JKOJLO9PJJNO
*
a
1&
DBAD∠ =
M%Q1&#R&!:89JNLN1&JNKNM(=!S!
J(N1T!!;1UVB?!+KLQ#,MG:G5;BJKLQ#
Câu V ( 1 đim) ().@C!<PPWX9Y<ZZWOM6!4X
789/:=A
+ , + , + ,x y z y z x z x y
P
yz zx xy
+ + +
= + +
Câu VI ( 2 đim)
,![I\<
ABCV
P !BH!!89!;J;BC!6
' x y
+ − =
M !9>9J;BC!6
E * x y
+ − =
1&:(+E]*,M
69I^KM
,_0BC!6 !?!>9Q+]],1T!!;1&` !?!+@,&
!90899VB?!;BC!6A
' x y z
+ + + =
1&
x y z− + + =
Câu VII (1 đim) (59:
+ , MMM
* *
x a a x a x a x a x
+ = + + + + +
+ ,
k
a R∈
"Y6)!
k
a
U7M
. =
M%Q 1& amp;#R&!:89JNLN 1& amp;JNKNM(=!S!
J(N 1 T!!;1UVB?!+KLQ#,MG:G5;BJKLQ#
Câu V ( 1. ≥
!
x
Câu III (1 đim) GGBH
xdx
I
x x
=
+ + −
∫
Câu IV (1 đim) (6IB=!JK(LMJNKN(NLN;JKOJLO9PJJNO
*
a
1& amp;
DBAD∠