Hoc ki II toan 10-co dap an (cuc ki hot)

NGHÖ AN   

  DIÓN CHAU
!"#$
%"pht ( không k thi gian giao đ)
&'
()$"

 

 x x
− ≥
− −
 

   x x+ − −

≤
()" !"#$%$&'%%()!*+,-!!
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)45      2   1 
)%5567%58#9:
()*"
 );<=
α
>
/
π
+
α
=



6?


π
α
< <
 @A"'B

 
!C  C
x
A
−
=
−
()+" !
ABC∆
DD<=0

< =%<E=2%);F
 .8G$HE
 I9;J
ABC
∆
 .8G$KL+
b
m
G *!M'%<+E

()," !KN
d
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 );&!M'%P+KN
d
 R+KN,P6$6(D6?KN
d
 R++L+6?KS 
( ) ( )
 
  3x y− + − =
+T+L+D
!!6?KN
d
()-" B%T!%<E D
! ! !  /  
  
A B C
c A c B c C+ + − =

(Cn b coi thi không gii thch g thêm)
./0123"44444444444444444444444444444444444444444444444444456789:3;44444444444444444444444444444444444444444444
 %<$='>?&>@
() AB9)3C BDE

 

 x x
− ≥
− −



 

  
x
x x
− +
⇔ ≥
− −
Q.UVC=
 
  
x
x x
− +
− −
ECWGVC
C
−∞




+∞
OC> >X>X>O
CO OXO>X>
CO O>X>X>
VC >XXOXX>O
RYL9%J#$


 O Q Q Z

S = ∞ ∪


×




   x x+ − −
≤

.UVC=

   x x+ − −
QVC=


x
x
=

⇔

= −

ECWGVC
C


−∞

−

+∞
VC >O>
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[Q ZS = −


×



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
x
+ + + + + + + + +
=
=020
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a67;bG^L67;


6$


>

1 1
1

e
M
+
⇒ = =
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
2M⇒ =
c
         

 020  020  020  020 / 020 2 020 0 020 1 020 12 020 3 020

x
S
− + − + − + − + − + − + − + − + − + −
=

x
S ≈
/
.8#9:

x x
S S=
≈






×



)D
 
!  c
α α
= −
=
 

/ /
− =

!

c
α
⇒ = ±
6


π
α
< <
`

! 
α
>
RYL

!

c
α
=
⇒
 

! c
α
α
α
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 
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/  
A
π α
α
α
+
= + =
−
L




α
=
-



 



A
+
=
−
=
 
 
+
−



×
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

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 

!C  C
x
A
−
=
−
=
  
 ! 
!C  C
x c x x+ −
−
=
 
! 
!C C
c x x−
−
=
 !   !C>C
!C  C
c x x c−
−
=
!C>Cc


/
   
  !0a b c bc c= + −

=
 

 2 2

+ −
=/3
/3 1BC a⇒ = = =
%


/

  

ABC
S b c A
∆
=
=
 
2
 
=
 
%



×


/
  

 
/
b
a c b
m
+ −
=
=
  
1 2  
/
+ −
=
 13
b
m⇒ = ≈
%

×

/G
*!M<+E T
a
h

 

1
ABC
a
S
h
a
∆
= = ≈
/3%



( )
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   

  
d M d
− − +
=
+ −
=


×
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∆
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)D

d
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Q 
d
n⇒ = −
uur
R
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∆
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∆
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=
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d
n = −
uur
c%5J
∆

 
 
x t
y t
= +


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
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  3x y− + − =
⇒
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l
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l
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e d l R⇒ =

⇔
 
 

  
m− +
=
+ −
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
  
  
m
m

= −
⇔

= − −


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

     
     
l x y
l x y
− + − =
− − − =




0
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A B C
π
+ + =

  
A B C
π
+
⇒ = −

⇒

! 
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A B C+
 
=
 ÷
 

R)=
! ! ! c A c B c C
+ + −
=
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 
A B A B
c
+ −
   
 ÷  ÷
   





C
−
=
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  
C A B A B
c
 − + 
   
−
 ÷  ÷
 
   
 
=
   
  
C A B 
 
− −
 ÷
 
 
 
=
/  
  
A B C

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