Bai tap 2.6 ([2] sec 7.8)

012345678 69 895 6839 5165

83 535165 83  

96 5165 83 85125258 836

8  898651531516536 836865 !!"#9$6$8

8 5 88385695795 6 1838 95 6463 8

89 89!'(238 5 1325686$6223869 3195165

6 83 06$)823565 5 59698 95 6$ 318 1

5 +25% 65 6  661 63 6 9654

5 6 285.287 68 63 /

69 83 8 $ 6)9$ +#,851 :  06$ 23565 5 95 6896 5 351655

6 6956618 69 

;< )

=>

))@ABCA

)D EFA

) A

H>

))D EFA

A CA

AI >

EFA #

I JKL@#

=

- FA #

CA

JKL@#

=>

 FA # CA

=>

 FA # CA

=>

) FA # CA M?AB< E

FA #

N?AB< EFA

OPQRSTUVWX Y Z [\]^\_]`Z ab_c]def gggg hih

j2k5067

-) l"!#l)m#!

# !!#!)m!

m !!"#ml!m

l !!"##"))!

' !!"##"#''

" !!"##"#''

=

- FA # CA

j2k506n

-# !"m"m"l#

' )!#"m'')#

) #'#)"l!l

) l!#l''l)#l

) )#)m#)ml

) l##lm"l

=

-))D EFAB@ApCA

qr

7tr

nnr

nwr nqrHm

# ) JmF ACA

H)

A'CA

H>

A569A

?)D A#B#CA

H>

E

) A?9ABmCA

H>

 EA

E#AD mCA

H>

F>A#

D A"CA

H>

F> mEFA l CA

H>

)9A

ACA

n7r

H"

F> LyEy@mCy

H>

zEF'zCz

H>

{#D m{D #C{

H>

)AAD )#D #ACA

H>

F>3K-

C-H>

#389C

H>

)EFJA

JACA

H>

F>AEFA # CA

7xr

H>

F>#F}lB}

H>

F> A )D A#CA

HF) F> F#-

C-H>

l F~@#C~

H>

?A#D #BA #CA

HF) F>J#F)

wr

6891  8 895 63838 

nr€181 8 895 63 8 €1 

xr‚89 5 6 2  5

69 2658 4 469  *9 5 556

6 1832  

ƒ tr+6,„615 295893 69 895

8  $ 69 $ 

+$,‚89 5 6 61369 

5 69 265 4 4 4 4 4

69 

+,‚89 5 5566 2  485 35

u…t8 8 895 63  8 

62655 51656 

F> )

#AF 'CA

H>

) )

?mAD )B#CA

A‡ ) )# -< )))l)"))

A< - N M A< )

o4)p

o4)p

o4)p

o4)p M?AB< )@A

 

N?AB< )@A) )

A‡ )) )

-< ) ~< )@A A< ) A<

-m

H# )9?AF )BCA

H>

F>389A

)D A#CA

H)

 )

#AF )CA

H#

) )

#AF )CA

H F>A#)D 'CA

H#

A#F 'AD "A CA

HK@#

 ACA

H>

) lEFA l

CA

7r

_ˆ_]‰Zf_f

Š‹ Œ

012 032

002678 

 8   8678 8  8 

78  7  8     8 ! 8"     8   68 #  68$  

0%2 8

! 78 8 87  "88 &&

0'(0)  78 8   7 78  8  88 78   78 8  

0+2

0)2

%,2- 8 78   /// 

-!.08 78 8     1 8 

-.28  78 

-.37 7  8 

-!.37 7

 7 7 8 488

%32678 5678597:;<77= 88  8 

78  78 8  78  78 1

  78 88  78 8 88 37 7

>?@ABC

DE

>

>?GDFH IE

#BCJKL#

MN

 >K7OE > # LP #BCQ >

MN

ON RPSQ =S? TU N MT

OT RPSQ =S



T U N MT

OT S =S? 

VN

ON S =S

%12

W

VN

 W7OS =S

K

#

$ W? 

VN

 W7OS =S

M$

 < S =S

MN

7 $

SP SQ< =S

M$

S< =S

0'2

<

<

MN

# SGS$#O F =S

?M$

 $

GS $X SQ =SXMN

$ $

GS $X SQ =S

MN

 $

GS $X SQ =S

Y/ NQ

MN

 $

GS $X SQ =S

MD

 #

GS =S

M$

 8SGS# =S

MN

 #X 7 SS =S

MN

$ GSSX $FO S =S

4,2

432

51(5%3Z87 78      8 - 78 8  8.

512

532

[

[552

[502

[5%2

[5'2-.\ /8    8

Z8  !8   8 8  

/&/$/$/$/ $/ ]8 8 7

 8 ^

-!._8 78 ` 6788 7  7

7  8 

-.\8 ! ! 78 8 88

 _8  7  8" 8

7  8 

[5+2-.\ /8    8

Z8  !8   8 8   /

$/$/$/ $/ ]8 8 7

 8  8 ^

-!._8 78 ` 6788 7  7

7  8 

-.\8 ! ! 78 8 88

 _8  7  8" 8

7  8 

5)(05_8 78 ` 6788  88 8 7878 78

  8  8 

0,2MN

$ #X 7SOS =S

MN

 SKSX $ =S

5)2

VN

# aPSQ =S

#b Sb # R a

VN

# aPSQ =S RPSQ? $LGS

VN

# aPSQT? & =S

VT

# aPSQ =S aPSQ? $L-GS O $.

VN

$ aPSQ =S

$b Sb $ R a

VN

$ aPSQ =S RPSQ? $LS

#

VN

$ aPSQ =S

$ aPSQ =S aPSQ? P#SQLS#

c?dPS/ eQ f O#g Sb /b eb $LGSX# h

c? iPS/ eQ f b Sg DL#/jb eb 8#Sk

c? iPS/ eQ f Sl /jb eb SLPS#X mQk

c? iPS/ eQ f b eb #LPS#X mQk

542

c? iPS/ eQ f Sl O#/b eb 7OSL#k

c? iPS/ eQ f Sb $/b eb 7Sk

M$

 GS S =S

M#

 # n =n

M$

 7S$LSK =S

M

O$ 7S$LSK =S

MD DL#  S =S

MK

 S#O oSX &=S

M$

 FeO $$ =e

MKK

 PSO $QO$L& =S

M$

 =S G$O S#

MK

O# F =S

412

MA

o F PSO oQK =S

M$F

O# =S

GFSX #

3)2

pqr ssss tuvwxyz{| }~€‚ ƒ„~…†‡ˆ†‚ }~‰Š‹}‚ ‡

01234567855 688  6 684

5  67855 45659

8 674 65 58559

6598647895 "6 6 58

#######$

0%2& 56  "5 '()*(+,-./(0123/4 4

5  6 

5 786 5 49546456 8 

6 5 659899456 5 68 584 

5 6  64

092 5856  "9 9

45854"5 5 68 584 45 

0:2 585  "

9 56 &5 68 584 4

5 68 584 6 585

0;2& 6995 98 4"

585

0<2 585 

0=2 585 659956 5

6598 8984

00256 5 8 5 4585 6 5 6598

99438 5 6598568 

0>256 5 8 5 4585 6 5 6598

99438 5 6598568 

446585 6995@

>12 5856 "5 5 6 659

86995

AB

#

C(

$D CEFC

EG (D $ (G H$

IB

#2JCKFC N#"BK C B2JCKM $ 2

O

AB

#PC

CQD $H

O RCD $SFC

O

O

AB

#P$

TCQD UH

O

CD QSFC O

IB

#,HCFCMI$

#THVFV

IB

#CQ,HC Q FCM$

QIB

#,HC Q FC

A(

HB FCDAB

(2JCKFCMAE

HB FCDAB

E2JCKFC

E (

IB

1G (

WJ1KM 1XJ1KH 2J#K

WJ1K 2YJ.K

.Z #

#[ 2YJ.K[ \,(.

#[ 2J.K[ ],(.

1G (

XJ1K ] ( Z #

#[ 2J.K[ ],(.

2J.KM 2J.KM ,.

2J.KM $

1 X

XJ1KMAB

#2J.KH1.F

2J.K

IB,0M ^FC

IB,HC Q FC

IU,HC Q

FC IB,HC Q

FC

=:2  387 5855 96

665898

585 5856 5 86 586 4665

65

=;2 5 67856 856396 9

5c5 5   59$### 48599

5 985 86585689

=<256 5 ,1+(),-e,*3+f.V 5856 59`95

 5 8658568989565

86 g95 h865856 7 39

6 6956 cU8 5 855855 6658`6956

99  6 5 `

==24579 59 6 8 1.*(/-1.,/,3i/()jV5

95976 5 946545 6 45 9 59

49 767946889465585 88k9

 58 5856 4968 9

86 946545  5 645

 5 9595  9 996 4594656

6 5 49 88645 7

5 9595  9 5 85 9465"658

585

&5 85 946545 6  96 "

5 996 9465

=02 8595 855 585845

" 8459

5 594695 5 856 5 78 4

585 9  95 #

$

7  4`95 85 56 5  

765 `9

78_8565 7986 5 96856 @

78_8565 8  _@

=>2 6956 R 86856 984

99568 855 "99

65 6658 9856 4585 4,(0

*,  85 65 6

55 86856 8 645 6868

856"5 8  56 5  

857

p95976 8 5 5 585

AB (

$

CQD $FCq ###$

(

=?2

$Ur s H####$Q$

$Ur

AB

#.s.F

4J#K 4J.KM 4J#K,

s.

IB/J.KF /J.KM XYJ.K

X

XJ.K

XJ.K

VJ1K CJ/KM

$

QJtH /KQ

VJ1KMAt 1

Q/

T/QH 1CJ/KF/

CJ/K 1

VJ1K

/ t

$

Q4uQ

t

] 4

u#

C v

v M wJC"VKxCZ $"#[ V[ $yCz

{|}~€‚ƒ„ … † ‡ˆ‰Šˆ‹‰Œ† Ž‹‰‘’ ““““ ”•ƒ