
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

   










 !" 
#$ %&'()*+,+
-+,+"
.$/0+12$/0
+1
3$/0+10
2
4$51067
8&9

:;<=>!?@AB
CDEF
$  !"#$%&'
#$ ()* +,-#.()* +,%()* +,()
/0
1

7x ≤ −
6
7x ≥
8
Fx
≥
G$ 6B3CB3GH:-#.GH:%H
1C 5I2CI2 6B?CB? 8D
I$ J=()* +,
? 2 2 @x x
+ ≤ +
%
1
2x ≥
5
2x ≥
6
2x ≤
8
2x ≤ −
J$ H:%'K
1
 2 ? 2− + ≤
5
L 7 2≤ −
6
 2 E   E− + < − +
8
343  7 343  ?+ − > + −
K$ M,N-# (#OP*=()

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X!*
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⇔ > +
7 Fx⇔ >
⇔

x >
4.E?
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x >

 4.7?
(
3 7 3
3
7 2
x x− +
− ≤
2 3 L  3⇔ − − ≤ +x x
2 2 L  
⇔ − − ≤ +
x x
2   2 L⇔ − ≤ + +x x
32
⇔ − ≤
x
⇔

32≥ −x
4.E?
_>=()* +,%
32≥ −x

⇔ + = +
⇔ =
⇔ =
3
aJb#
7 4 7x x− < ⇔ <

,
7 7x x− = −
c*
7 7 Ex x
− + =
7 E 7x x⇔ − + = −
?x
⇔ =
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52X' ^ 4.?
(TM K)Đ
0
4
(
0-13