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Bài giảng Đề&đáp án thi thử Toán 2011 (đề 16)

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c x c x
π π
⇔ + + + + =

!
!    X   ! 7
5 5
c x c x
π π
⇔ + + + + =
2$W

 
5 !
c x
π
+ = −

  !
5
c x
π
+ = −
@E
e2

 
5 !
c x
π

+ = −
$W&j
!
!
x k
π
π
= +

X
!
5
x k
π
π
= − +
7!X
7!X
7!X
7!X
!!
eDlj$%&$%&F
! ! 6
6 !
  
  
x xy x y
x y x xy

− = −



− − = −


eiGn#o
!
6
x xy u
x y v

− =


=


+$Wj
!


u v
v u

= −

− = −

e2j'$W&j)0@07[!0[6
e;-A&$W&jS0*@07[07

7!X
7!X
7!X
7!X
6 eiG?S
;=M?[SMS+lfS?7(?+
:
x
π
=
(

!
t =
;-A


!
! !


!
@ @t t
I dt dt
t t
= − =
∫ ∫
eiG
!


@ 0u t dv dt
t
= =

 
0du dt v
t t
⇒ = = −
B)*'

!

!
 
  ! 
@ @ !
 
!
! !
I t dt
t t t
= − + = − −

ep)
!
!  @ !
!
I = − −

7!X

7!X
7!X
7!X
: e"(
e2UI@')&.D+P&
 SH ABC⊥
eqr&&A&LG#J&BCD+BCFG*@

7
57SEH SFH= =
es
HK SB⊥
+@f#@)f)*'&A&LG#J&BCDBD
1&
HK A

etf#@)f=$WC?CD?+
!
!
a
HA =
+
7
6
 57
!
a
SH HF= =
e;&BI)&EIA
! ! !

   6
7
KH a
HK HS HB
= + ⇒ =
e;&CI)&EIA
!
!7
!

6
6
7
a
AH
AK H
KH
a
= = =

6

!6
AK H⇒ =

7!X
7!X
7!X
7!X
X

eDl
 
   
a b c c
ab c ab b a a b
+ − −
= =
+ + − − − −
7!X
e;-A
  
        
c b a
VT
a b c a c b
− − −
= + +
− − − − − −
u++M$%&OO?++)V,&70?v[+[+[
M$%&
e#Mo&cJ&PhM$%&$W
6
  
6  
        
c b a
VT
a b c a c b
− − −


− − − − − −
?6#
iJ&PS*',H,

6
a b c= = =
7!X
7!X
7!X
5
e

A#$%&'(h
 6
! !
x t
y t
= −


= − +

A#
 60!u = −
ur
eC)V


 6 0 ! ! A t t⇒ − − +


e;ACD0

?:X
7


 0 
!
c AB u⇔ =
uuuur ur



!

AB u
AB u
⇔ =
uuuur ur
ur

!
X 6
5d X5 :X 7
6 6
t t t t⇔ − − = ⇔ = ∨ = −
e.k(@
 !
6! : !! 6!
 0 +  0 

6 6 6 6
A A− −
7!X
7!X
7!X
7!X
4
eMp)

70 07M −
A#

0 !0 6u = − −
uur
M]p)
!
700:M
A#
!
0!0Xu =
uur
e;A
 !
0  :0 w0:u u O
 
= − − ≠
 
uur uur ur
+
 !

70!0:M M =
uuuuuuur
qx
 !  !
0  5 : 7u u M M
 
= − + =
 
uur uur uuuuuuur
 MM]&#J&
e2U^@G#J&PMM]?v^A#
0!0 n = −
ur

p)Z

A#$%&'(
! ! 7x y z+ − + =
euyc*.Z0[0)Vz^+-AA#
7!X
7!X
7!X
7!X
w ei{),j9Sv7
e;I9SxS?@&j
e;I!9Sx
x ≠
+l#$%&'($%&$%&F

 ! 

 !@& !:  ! @& !:  @& !: 
x x x
x x x
+ =
+ + + + +
iG
@&  
x
x t+ =
+$W#$%&'(

 ! 
 ! !t t t
+ =
+ +
&$W??[!|6
e"F?
@&   
x
x⇒ + =
#$%&'(*&j
e"F?[!|6
!
@&  
6
x
x⇒ + = −


! 6

!:  x x⇔ + =
e
}fc*

w
x =
@&je
})

w
x >
(";ev
7!X
7!X
7!X
7!X
})

w
x <
(";e~+f*eA&jM)*c

w
x =
e@)f9&j#$%&'(m@S?

w
x =
5 eA>R707+,=a?
eMbE.#>j

 0  d O d⇔ <
e;A
  
  
! ! !
OAB
S OAOB AOB AOB= = ≤
;-AMj=&CRD@Fc,H,
7
d7AOB =


 0 
!
d I d⇔ =

m
⇔ = ±
7!X
7!X
7!X
7!X
4
e


A#$%&'(h
! !

6

x t
y t
z t
= −


= − +


=

e
!

A#$%&'(h
!
X 6
x s
y s
z s
= +


= +


=

e2•
 !

0d A d B∩ ∆ = ∩ ∆ =
! ! 0  06 D!O0XO60A t t t⇒ − − +
e
 ! 06 50 6 AB s t s t s t= + − + −
uuuur
+zaA#
0!0 6n = −
ur
e
  €d R AB n⊥ ⇔
uuuur ur
K&#$%&

! 6 5 6
 ! 6
s t s t s t+ − + −
⇔ = =


!6
!:
t⇒ =
eMp)
  !6
 0 0 
! ! w
A
A#
0!0 6n = −
ur

?vMA#$%&'(
!6
 
w
! !
 ! 6
z
x y

− −
= =

7!X
7!X
7!X
7!X
w
ei{),j9
6
7
@& d 4! 7
d 4! 7
x
x
x >


− >



− >

&$W
d
@& 46x >
"(
d
@& 46x >
v#m$%&$%&F

6
@& d 4!
x
x− ≤

d 4! 6
x x
⇔ − ≤

6 w
6 d
x
x

≥ −








!x
⇔ ≤
e@)ff#&j9
d
@& 4!0!•T =
7!X
7!X
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