Bai tap 1.3 ([2] sec 2.8)

012 3333  

 !!"# $% &"% !'% &()* '+*$(!* ,.//+0

$%$% 1/ %) 2+3/3/,4%* +/ $% 0$%!5 !'610"3

7 $! /8$% $% &"% !' 93!: (

;

<;

A;B%!:* (/ $% &"% !'% "!"+3$(!* '+*$(!* '!#/$

33/ (*  39!$!# +3$+,C/ $% 0$%!5 !'610"3 7 $

- #/$ 3 3 /4

D %!+ /4

E

GFF

IJK

N

;

O

P

F

N

N

O

P

F

N

O

P

Q

R;

T

UV

U

AC/ $% &()* &"% $! /$(0$ $% )3+ !'% 5()$(),

%* /8$% $% &"% !' ,

;-4

-94

-4

-54

-4

-'4

-&4

A;-4

-94

-4

-54

-4

-'4

W$% $% &"% !'% '+*$(!* (* -4X-54:($% $% &"% !'

(/ 5()$() (* YXYZ,[() /!*/ '!#!+%!(/,

N

Y

F

N

M

N

F

N

F

N

F

N

F

M M

-94

-4

\;

UVJ]L

UVJ^L

UVJ_L

UVJ`L

UVJ7L

N

H

NabcMd

UVJeL

UVJ_L

UVJ`L

UVJ7L

UVJeL

UVJf7L

UVJf`L

N

H H

NabcMd

UVJf_L

UV

ij k

012 032 042

562 8 8

8 88 

 !"!

79#88789 8! 79#$8 %$ ! 8

8'8 (

) 79#88%8 88

89!

5*2789+ ,$ !

) 79-  8878988 

888!

502789+ ,$ !

) 79-  8878988 

888!

/  %8!/8 70818 9% 8

. 8 22"3443!

8 ( 8(

7  88 %8. !

552   8688 7

!/8 %%8. 

8 2843444!

7 8 ( 8(

7  88   %8. !

7998 8 !

79:.  8%8.

 (;<=>?

;<

;<=>?

>

;=>?

@<=

@<=

@=>

552

'<

'

'<= '=>?A >3B C>

'<

'

'<=D?

'=D?A DEF 3D

'<

'< '<=D?

'<

GA CD '=D?A CHBD

'=D?A DE

I=>?A C> J=>?A>F E>

0K2

'=D?A B "D"F D I=D?A C F3D

0L2

8 % ! 8 

 .(

*52/88%88$88

M888%8 8.  !

8 %  !N

88 % %(

*5O*1P8 88. 88 

8 888QRES !

-88.8 8(

*12

 %8. , , ,8 

88%T8

79# %8. , ,

8 !

79#.87898798.8

 !

79#$8 %% 

89 !

)*32  !

 %8. , , , ,8

88%T8

79# %8. , ,

,8 !

79#%8.87898798!

7998.8 !

79#$8 %% 

89 !

*4O04U % $

 %! 8 88

 %!

052'=D?A D"B "DF 8 052'=D?A DF CD

'=D?A !8D3B DF "!V '=>?A 8>B 2>3

'=D?A WDF X '=D?A3DB"

'<=D? '<

'<=B"?

'<=B3? '<7B9'<=B ?

'<="?

'<=3?

'<= ? '<7 9

'<=4?

'=D?A D"

'<=D?

'<=B3? '<7B9'<=B ?

'<=3?

'<= ? '<7 9

'<=4?

'=D?A D3

*K2

'=D?A D

'=D?A YD '=D?A D

'<=D?

Z[[\ ]\\\

]^

_

Z[`\ Z[a\ Z[b\

]a

c

d<=

;<

;<=

efghijklmn o pqrstruv wxpv wrs xys xsz{|}pv ~|  €‚

22" H!2 227 E!8 22E H! 222 E!3

228 8!H 3444 E!4 22H 8!E 344 E!V 22V E!2 3443 8!7

@=>

@=>

284 " ! 274 37!4 2H4 "8!V 224 38!V 2V4 "E!4 3444 38!V

;=>?

;=>?

012345 5 454559545

 9 545545  55554 55

45

002345 5 454 9545

 9 545545 5

55554 5 5 45

0!"0#$54557 57   3454  %% 554555

 55 &5

 7    

4   %% 55545

4544585%5 5455

5)

0*2+,3454 9   5 - 555.5$5445

5545 /44550

.1235)

+&,$5455 5% +,5%545

.1 235/45459)

45

7

455

85

9:

9;

9<

= >?=@? 9:=@?

9;=@?

9<=@?

9=@?1 A@AB @C 0D2

9=@?1 2E@

9=@?1 2F >@B @A

9;

9<

G

H

K

6

5

1!"1*345485L545 45

 4 5&5

1#2

1M2 4459 N %555

 45B23,45 458/4

 5&945&54 45455

)/4995&945 5&9)

0O2N % 45+23,32,+B23,45

4459 /495)

(9  955%45 5&P

345 5 454  554

55 45

0Q2345 5 4  R 554

55 45

S

9:

9;

9<

9

S

I J

9;

9<

9 0T2

P=@?1 =@AB 2?AEC

9 9=@?1 @F UV@V

X

5

X

5

X

5

X

5

1!2

Z[\ ]]]] ^_`abcdef gh ih jkl mnolopqh rmjh rpk

0123456 156 8 85495

0  198

0 46495459

0 459648 41

 118549541 48 81

45469 145156!""48 81

98 899%45

4$14 9815 8549541596685495

0 4$14 981596685495415 85495

' (959519)%1 * 1 %1 959%95 %11 5545

194 198 118549598

11 4 8 %1 95

0 4 9% 198 98 %4  9

414

1198 4$14 98

 1!21403.53!1984 15 1

%4  94 64 49598 164711

: 8 :

;<*<= >? 9

@ :

A

5 A

A

9 2;B9=? B2;9=

2

<

CB 9 4D9E F 2;9=?

G

CB 9

4D9H G

4DGI 9I F

2JK;F=

2JB;F=

012N8 * OP1495@QC9R56 

029% 1 59 

029% 1 11 1  1 

0  98 198 34 <S45

95<@2

T012N8 *9% 1 59 

02N8 *R56 

029% 1 11 1  1 

U 062N1 02(145 

9% 1 85495 459648 41

1V345618 18 156 41

W 4 5 5495 59648 )

41 345618 18 156 41

0  198 85495 

0 %1$1 984648 41

02345618 18 

L XYZ[]^_`156abc][\]^_``Yabd^[bdYe981

(

156

4  4  415695(4

4 4$14 1562J;.= 

2JK;.=? f g4

G K2;.K f=B 2;f .=

2JB;.=? f g4

G B2;.K f=B 2;f .=

2 2J2

9 2;9=? 9h9h

i

2J 2;9=? j9k

2J 2;9=?h9B Vh

l

>? 9@mS ;G*G=

>? 9nJ;@mS.=

.o G nJ;G=

n;9=? 9@mS

2 ;G*G=

>? pS9 2J;G= 2J;.=

.o G

2;9=? pS9

qrstuvwxy z{|} {~  €‚

z{|}{~

ƒ„…ƒ†‡ˆ‰ƒŠ†ƒ‹

Œ

021 4 91( 1  4 4951 1( 998 1% 941

499444

'498 899%45 11( 9

4 49511( 9

082

,0121 4 8 9 954591.

021 4 8 9 9545995 45$1

115(91(19 1981

85495

Ž1 N5 11 1(

1 945;.*2;.==

>? 2;9=

;B*=

>? p9

>? <m9 >? 59

>? 9 >? 15B<9

>? 159 >? 459

>? 9F

>? 2;9= >? ‘

lO6145%1 98 899%45 15641%4 1



W 4 1%1(45%41 4158149 

N1%4 

i1 899%45-4 4-1%

012 -1% 02+48 -1%

0279515’-1% 0 96-1%

0299-1%

0121 4 91( 1  4 1

1( 998 1% 941

499444>? 2;9=

9?



9  g 

2;9=? ‘



9  g 

.2;9=? 



9  g 

B2;9=? ‘



9  g 

K2;9=? ‘



9  g 

.2;9=? ‘