Bai tap 1.6 ([2] sec 3.3)

nopqrst vwv xfhjyz{jyfk}~{hj}€}f{hji~‚€i{j}€k ƒƒƒƒ „…†

9:

0134546705,7684973 2
,3 27

6
9348
4
5+ 95,0 65,32
5+ 95,5, 0 56753+2 7970 56810 56
,32 6,
4  
55
64,32
5+,
6,
!"#$%&"'(4)434**49+4)
6
)
9**49
+9
6
)
,5+,
6,05
+ ,9
,,
,32
,32 

5+
,

,0 ,32
05

+
,32 
9, 5+ 9,
, ,32 ,
0 
12 .
684
9696
1
94
9*
6
9/
01

lml

fgfhijkfk

<=<\114)496
64
,
CBKM,P09,[ 1

6,
DBbMcP0cY
c
FBaM7P07[U7
67
,
TBZ0 X6

9,

47
<47


;BKM,P0e,9,
>BZ0,[d
,
BbMcP064c[6
9c
IBZ0U_M
_[`_P
1[9,

,

4,

<;BZ0 1X
6
9,

<>BZ07M7[
67P
<BZ0,9,6
9,

468
6^^,M,P0X,