Đ THI THỬ ĐI HC KHI A NĂM 2010
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3 2
1 2
3 3
y x mx x m= − − + +
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1%+,'*2'
3 3
cos sinx x m− =
3%+,'*2'
%+,'*2'4'*'*(
;
4 4
x
π π
∈ −
$1
3%+,'*2'
2 2 2
log 9 log log 3
2
.3
x
x x x= −
5'5%&'
2
4
4 2
4
sin
cos (tan 2tan 5)
xdx
x x x
π
π
−
− +
∫
6$
2'*7'**'!"89:;<=>%+,'*2'
( ) ( ) ( )
2 2 2
1 2 3 14x y z+ + + + + =
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( )
1; 3; 2M − − −
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( )
1;3A
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2 2
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01
2'
( )
5
2 3 15
0 1 15
1 x x x a a x a x+ + + = + + +
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9
a
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3 3 3
3
(1 )(1 ) (1 )(1 ) (1 )(1 ) 4
a b c
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3 2
1 2
0
3 3
x mx x m⇔ − − + + =
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2 2 2
1 2 3
15x x x+ + >
( )
( )
2
1 (1 3 ) 2 3 0x x m x m⇔ − + − + + =
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2 2 2
1 2 3
15x x x+ + >
1m⇔ >
1
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( ) ( )
cos sin 1 cos sin 1x x x x− + = −
Y;
cos sinx x
−
SZ=('
2t ≤
'*(
( )
2
,
2
2
x k
k l
x l
π
π
π π
= +
∈
= +
¢
( ) ( )
cos sin 1 cos sinx x x x m⇔ − + =
Y;
cos sinx x
−
SZ=('
2t ≤
; 0; 2
4 4
x t
π π
∈ − ⇒ ∈
%+,'*2'EL
3
3 2t t m− =
K'*A%*2?F2:=82%+,'*2'4'*'*(
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4 4
x
π π
∈ −
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2
;1
2
m
∈
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÷
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%+,'*2'
2 2 2 2
log 9 log log 3 log
2 2
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x x
x x x x= − ⇔ = −
Y;
2
log 2
t
x x⇒ =
C+,'*2'2X'
3 1
3 4 1 1 1 2
4 4
t t
t t
t x
= − ⇔ + = ⇒ = ⇒ =
÷ ÷
2
4
4 2
4
sin
cos (tan 2tan 5)
xdx
I
x x x
π
π
−
=
− +
∫
Y;
2
tan
1
dt
t x dx
t
= ⇒ =
+
1 1
2
2 2
1 1
2
2 ln 3
3
2 5 2 5
t dt dt
I
t t t t
− −
= = + −
− + − +
∫ ∫
5'
1
1
2
1
2 5
dt
I
t t
−
=
− +
∫
Y;
0
1
4
1 1
tan
2 2 8
t
u I du
π
π
−
−
= ⇒ = =
∫
MA8
2 3
2 ln
3 8
I
π
= + −
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1; 2; 3 , 14I R− − − =
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uuur
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, ,A B C
⇒
B'*'*?O3a
2 1
( ; ), ( ; )
2 1
m a
B a b C m n
n b
= −
⇒
= −
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2 2
2 2
3
6 2 6 0 1
5
6 2 6 0
1
a
a b a b b
m
m n m n
n
=
+ − + + = =
⇒
=
+ − + + =
= −
;
7
5
1
5
9
5
13
5
a
b
m
n
=
=
=
= −
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0
( )
( )
( )
5 5
5
5
2 3 2
5 10
0 0
1 1 1
k m k m
k m
x x x x x C C x
+
= =
+ + + = + + =
∑∑
N
9
a
+,'*T'*`d
>=82
0 9 1 8 2 7 3 6 4 5 5 4
5 10 5 10 5 10 5 10 5 10 5 10
9 5005a C C C C C C C C C C C C= + + + + + =
e%Nf'*JB'*T7:
( )
3
3
3
1 1 3
(1 )(1 ) 8 8 4
1 1 3
(1 )(1 ) 8 8 4
1 1 3
(1 )(1 ) 8 8 4
3 1
(1)
4 2
a c b a
b c
b c a b
c a
c a b c
a b
VT a b c
+ +
+ + ≥
+ +
+ +
+ + ≥
+ +
+ +
+ + ≥
+ +
⇒ + ≥ + +
]J=K'*"82
1 1 1
1
8 8 8
1
a c b
a b c
abc
+ + +
= =
⇒ = = =
=
MA8
3 3 3
(1) (1)
2 4 4
VT VT≥ − ⇔ ≥ ⇒
Z=%T'*'