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Hai đề thi Đại học và bài giải chi tiết (Đề 1 và 2)

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ĐỀ THI ĐẠI HỌC ( ĐỀ SỐ 1)
A.PHẦN BẮT BUỘC
CÂU I:

 
     y x m x m= + +

m
C





 !"
#
 $%

A
&'()*&+',
'
-


C
."


/0"'1'
-
23'



M
&

M
4'/1'
-
$


/'/

M
$

M
&56$
CÂU II:
78

9
6
'
'  
xdx
I
x x

=
+


&

9
6

'  
xdx
J
x x

=
+

:;<&;=<
>?( !@A$"
B
C:''
-
.";$<&

D




  '
xdx
K
x x



=


CÂU III:
E'F&+'3'
[ ]
$t ∈ −
"0G
 
    t t t t+ + − ≥ + − ≥ −
2'@'

G
  % 
       % x x x x x x x+ − + − − ≥ − − +

CÂU IV:
0H"'A!1'A,9c
B
I'J?"!
B
K!'A@'?
6$008
B
6?I08
B
L
0H"'A!1'A,Mc

B
c
B
I
N
K!'A@'?6H'(F
B

08*"'4K$
B
08*H"4K&
B
O4P'08?I
!J4KL
B.PHẦN TỰ CHỌN
:'Q3JR!S"&SHG
CÂU Va:


0TU5V0CU5V4

&!IP"$
 SA ABCD⊥
&
SA a=
APUV4WC'/X"CY'780
Z
ACM
α
=

[P
SN CM


E'\4!I!JJO'
-
&:/:E]'^TU\_
a
&
α

[P
AH SC

$
AK SN

E'F
 SC AHK⊥
&:J]'P[`

CÂU Vb:
8a)C$)b
 d
G
   6x my+ + − =
&"'OG
 

  G  % % 6C x y x y+ − + − =

&
 

  G % % D9 6C x y x y+ + − − =

23';4RO

 C


"
 d
c

 C
P'"''/RH'^
U&5S+'''
-
."

]'^:"';U54+W&:''
-
0
E'

 C
'()*&+'

 C
S'(


Y !."W@
'(!C(!."

 C
&

 C

ĐÁP ÁN
CÂU I:

 
     y x m x m= + +

m
C





 !"
#
 $%

A
&'()*&+'



S+'G
 
  Dy x x= − +



7] !"U&0^0?G
#
  %

y k x= − +
]'()*



#
 
)  D   % 



9 9 
x k x
x x k

− + = − +



− =


0'^
"C&G
#
  
  D 9 9   %

 
d D #  6

 d M  6
 6
 
 
d 
x x x x x
x x x
x x x
x k
x k
x k
− + = − − +
⇔ − + − =
⇔ − − + =


= ⇔ =

⇔ = ⇔ =



= ⇔ = −


SeC

 !"U&'()*&+'

4G

C%"CC)D"C
 9%D
 d
y x= − +


/01'
-

"0G
 
    y x m x m= + − + −


$

9 9 y x m= + −

$


6 9 9  6y x m= ⇔ + − =


6


x
x m
=



= −

[01'
-


0'^RH'^
 6 m m
⇔ − ≠ ⇔ ≠



/'/1'
-
X

$X


&56$
7/



 !"'/1'
-
X

$X

"'"f)
g
 f x
G
 
g 
       
 9
m
f x f x x m x m

 
= + − − + −
 
 
T!C"

X


X

4G

   y m x m= − − + −
X

$X

$5
B⇔ ∈
X

X






%
T&+''h!?'^

e%
7TG%
CÂU II:
78
 
i 9
9

' 
$
'   '  
6 6
x x
I dx J dx
x x x x
π
π
= =
∫ ∫
+ +
:;<&;=<
j
 
9
' ) )
k ;< ])
')= )
6
j
9
') )')= )
 ])
')= )
6
j
9
 ') )])
6

j
9
) ')  
6




j
 
9
' )= )
k ;=< ])
')= )
6
j
9

 ])
')= )
6
j
9

 ])
 
6
 ')= )
 
j

9
 
 ])
j

6
')= 

j
j
')= 
9


 ])
j


6
 )= 






78
  ' 
 
t x dt x dx

π π
= + ⇒ = − +
7Y'eG

6

6
9
x t
x t
π
= ⇒ =
= ⇒ =
6








 



6


  

%  
6

  

4 4
%  %
6
dt
I J
t
dt
t
dt
t t
t
t

⇒ + =


=


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= +

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+ −
 

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= =
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 
%
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D


  '


x
dx
x x
π
π
=


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  
4
  
9 %

4
  
4

%
9 %
I
I J
I J
J



= +
− = −

 

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+ =

 
= +



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78


t x dt dx
π
= − ⇒ =
7Y'eG


6

D
 9
x t
x t
π
π π
= ⇒ =
= ⇒ =

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9

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6
  '
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9
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9
' 
'  
6
  
4

d 
t
K dt
t t
t
dt
t t
t t
dt
t t
I J
π
π
π π
π
π
 
+
 
 
⇒ =

   
+ − +
   
   

=

+


=

+

= − = +
CÂU III:
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[ ]
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&
N

[ ]
$t ∈ −
A8)&+'
6$

x
π
 

 
 
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D
( )

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( )
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  '  '   '  m
 '    '  
 '   '   
x x x x
x x x x
x x x a
x x b
⇔ + ≥ + ≥ − −
⇔ + ≥ + ≥ +

+ ≤ +



+ ≥ +


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( )

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'  ' x x⇔ ≥
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x
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 
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 6
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  6   6 

 
x x
x x x x x
x x

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  t t t+ + − ≥ −
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 
+ − + − − ≥ − − = − +
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 
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6 
6 
6 
x
x x
x x
≤ ≤

⇔ = ∨ =

≤ ∨ ≥

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6 x x

= ∨ =
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6 x x= ∨ =
9

×