

 !""#"$%"#
#!&'!
Câu I (2 đim) (&)
* 
*y x x mx= − +
+,
, -))./01&1234&)5
m =
, 67-!489:&)+,;:.1&.:<=!9>9
 !?!+@,A
 ' x y
− − =
Câu II (2 đim)
,%-BC!6

 
) + , ) + , )
D * E
x x x
Π Π
+ + + = −
,%-/7BC!6
(
)


F
!

P
yz zx xy
+ + +
= + +
Câu VI ( 2 đim)
,![I\<
ABCV
P !BH!!89!;J;BC!6
 ' x y
+ − =
M !9>9J;BC!6
E *  x y
+ − =
1&:(+E]*,M
69I^KM
,_0BC!6 !?!>9Q+]],1T!!;1&` !?!+@,&
!90899VB?!;BC!6A
'  x y z
+ + + =
1&
  x y z− + + =
Câu VII (1 đim) (59:

   
    
 
+ , MMM
* *
x a a x a x a x a x
+ = + + + + +