262 ĐỀ Ôn Thi vÀo lỚp 10

8/14/2019 262 n Thi vo lp 10

1/165

book.mathvn.com 1 www.mathvn.com

VO LWWW.MATHVN.COM

222 12

1.)1

11

1( xxxx

A

12315 xxx

2

2

1x

2212

21

22

21 1

xxxxxxM

12221 xx

xx 44

xx 332

8/14/2019 262 n Thi vo lp 10

2/165


42 xx

12

13

3

12 xx

1

2:)

1

1

1

2(

xx

x

xxx

xxA

A 324x

xx

x

xx

x

x

x

6

1

6

2

36

22222

2

2

1x

81

CDEBCF

8/14/2019 262 n Thi vo lp 10

3/165


13

52

ymx

ymx

yyxx

yx

22

22 1

25

1

25

1

41

2

1

5

71

1

1

2

yx

yx

xxxxxx

xA

2

1:

1

8/14/2019 262 n Thi vo lp 10

4/165


12

1

x

x

11

2

x

x

8

1622

yx

yx

64

3

ymx

myx

232

12A

222

1B

123

1C

8/14/2019 262 n Thi vo lp 10

5/165


32

1;

32

1ba

1;

1 2 a

bx

b

a

2

2x

21212 xxxx22 11 xyyxS ayxxy )1)(1( 22

xx 12

2

2x

y

21212 xxxx

8/14/2019 262 n Thi vo lp 10

6/165


512

412

x

x

x

x

2 5

8152 xx

22

21 xx

33

6;

211

9ba

2532

yx

ayx

7

522

xyyx

xyyx

8/14/2019 262 n Thi vo lp 10

7/165


BD

AC

DADCBCBA

CDCBADAB

..

..

xyyxS

4

3122

322

32

322

32P

2

2

2

1

1;

1 x

x

x

x

232

x

xP

044

3252

22

xyy

yxyx

4

2x

y

4

2x

y

413 xx

0113 22 xx

8/14/2019 262 n Thi vo lp 10

8/165


1 1 1 1 1A= :

1- x 1 1 1 1x x x x

7 4 3

2 3 5 0x x

2 21 2

1 1

x x

2 21 2x x 3 3

1 2

1 1

x x

1 2x x

1 1 2:

2

a a a a a

aa a a a

8/14/2019 262 n Thi vo lp 10

9/165


1 13

2 31

x y x y

x y x y

2 2 2

5 5 25

5 2 10 2 50

x x x

x x x x x

1 1 1 1 1

1 1 1 1 1

a a

a a a a a

AMB HMK

( ) 6

( ) 12

( ) 30

xy x y

yz y z

zx z x

8/14/2019 262 n Thi vo lp 10

10/165

8/14/2019 262 n Thi vo lp 10

11/165


5

203

5

8

xx

8/14/2019 262 n Thi vo lp 10

12/165


)2;2

1

nyxnymx

2 5

13

3

y

x

C

CMD

2

3 2x

31

2

1;

3

2;8;

2

9

2

2 2

yx

mmyx

2

321x 2

322x

8/14/2019 262 n Thi vo lp 10

13/165


)..(2

1BCADCDABS

ABCD

x3 0322 xx

2

2

1x

2

4

1xy

12mmxy

ACABrR .

xxx

1

1

1

3

1

131 xx

22

21 xx

22

21 xx

8/14/2019 262 n Thi vo lp 10

14/165


21 xx

B C

)2;2

13

52

ymx

ymx

5168143 xxxx

231 xx

11

3

2

2

22

1

1

1

xy

yx

8/14/2019 262 n Thi vo lp 10

15/165


x

1

BMD BCD

x

09

813

12

xx

xx

22

21 xx

2

2NA IA=NB IB

53

3

myx

ymx

8/14/2019 262 n Thi vo lp 10

16/165


13

)1(72

m

myx

22

21 xx

2xx

19

14

3

12

xx

221

221

2122

21 322

xxxx

xxxxA

12

72

yx

yxa

8/14/2019 262 n Thi vo lp 10

17/165


5

203

5

8

xx

)2;2

1

nyx

nymx

2

5

13

3

y

x

C

CMD

2

3 2x

8/14/2019 262 n Thi vo lp 10

18/165


3

1

2

1;

3

2;8;

2

9

22

2

yxmmyx

2

321x 2

322x

)..(2

1BCADCDABSABCD

x3

0322 xx

2

2

1x

2

4

1xy

12mmxy

ACABrR .

8/14/2019 262 n Thi vo lp 10

19/165


xxx

1

1

1

3

1

131 xx

2

2

2

1 xx

22

21 xx

21 xx

B C

)2;2

1352

ymx

ymx

5168143 xxxx

BAM BCA

8/14/2019 262 n Thi vo lp 10

20/165


231 xx

11

3

2

2

22

1

1

1

xy

yx

x

1

BMD BCD

x

09

813

12

xx

xx

22

21 xx

8/14/2019 262 n Thi vo lp 10

21/165


2

2

NA IA=

NB IB

53 3myxymx

13

)1(72m

myx

2221 xx

2xx

19

14

3

12

xx

8/14/2019 262 n Thi vo lp 10

22/165


221

221

2122

21 322

xxxx

xxxxA

12

72

yx

yxa

22

2 12

1.)1

11

1( xxxx

A

12315 xxx

8/14/2019 262 n Thi vo lp 10

23/165


2

2

1x

2212

21

22

21 1

xxxx

xxM

12221 xx

xx 44

xx 332

42 xx

12

13

3

12 xx

8/14/2019 262 n Thi vo lp 10

24/165


1

2:)1

1

1

2( xx

x

xxx

xxA

A 324x

xx

x

xx

x

x

x

6

1

6

2

36

22222

2

2

1x

8

1

CDEBCF

1352

ymx

ymx

yyxx

yx

22

22 1

8/14/2019 262 n Thi vo lp 10

25/165


25

1

25

1

41

21

5

71

1

1

2

yx

yx

xxxxxx

xA

2

1:

1

12

1

x

x

11

2

x

x

8/14/2019 262 n Thi vo lp 10

26/165


8

1622

yx

yx

643

ymxmyx

232

12A

222

1B

123

1C

32

1;

32

1ba

8/14/2019 262 n Thi vo lp 10

27/165


1;

12

a

bx

b

a

2

2

x

21212 xxxx

22 11 xyyxS

ayxxy )1)(1( 22

xx 12

2

2x

y

21212 xxxx

8/14/2019 262 n Thi vo lp 10

28/165


512

412

x

x

x

x

2 5

8152 xx

22

21 xx

33

6;

211

9ba

2

532

yx

ayx

8/14/2019 262 n Thi vo lp 10

29/165


7

522

xyyx

xyyx

BD

AC

DADCBCBA

CDCBADAB

..

..

xyyxS

4

3122

322

32

322

32P

2

2

2

1

1;

1 xx

x

x

2

32

x

xP

044

3252

22

xyy

yxyx

4

2x

y

8/14/2019 262 n Thi vo lp 10

30/165


4

2x

y

413 xx

011322

xx

1 1 1 1 1A= :

1- x 1 1 1 1x x x x

7 4 3

2 3 5 0x x

2 21 2

1 1

x x

2 21 2x x

8/14/2019 262 n Thi vo lp 10

31/165


3 31 2

1 1

x x1 2x x

1 1 2:2

a a a a aaa a a a

1 13

2 31

x y x y

x y x y

2 2 2

5 5 25

5 2 10 2 50

x x x

x x x x x

8/14/2019 262 n Thi vo lp 10

32/165


1 1 1 1 1

1 1 1 1 1

a a

a a a a a

AMB HMK

( ) 6

( ) 12

( ) 30

xy x y

yz y z

zx z x

2 3

5 4

x y

y x

3 1 4 4a > 0 ; a 4

42 2

a a a

aa a

3 3

1 2 0x x

8/14/2019 262 n Thi vo lp 10

33/165


2

2

1

x m

x

1 2 5x x

1 1 2( 0; 0)

2 2 2 2 1

x xx x

x x x

8/14/2019 262 n Thi vo lp 10

34/165


61

Cu 1.

1.Ch 9 4 2 2 2 1.

2.Rt g A 4 9 4 2 .Cu 2 nh 2x2 + 3x + 2m 1 = 01.Gi nh v2.Tm m trnh c hai nghi

Cu 3. M nh ch 1200m2

b i 4m thm 2 tu bCu 4 n tm O n tm A bnknh nh n (O) t D, c n cung nh

c a) Ch cc ti c n (A).b) Ch phn gic cc) Chd) Gi b.

Cu 5. Tm gi tr 2 + 3x + 4.

62

Cu 1. Tm hai s tb l 116.Cu 2 nh x2 7x + m = 0

a) Gi nh khi m = 1.b) G 1, x2 l cc nghi nh. Tnh S = x1

2 + x22.

c) Tm m nh c hai nghiCu 3. Cho tam gic DEF c D = 600, cc gc E, F l gc nh

n tm O. Cca) Tnh s

b) Ch

8/14/2019 262 n Thi vo lp 10

35/165


c) Ch tm tdCu 4. Cho a, b l 2 s

2 22 2 2 2 a b a ba b a a b b

2

63

Cu 1.Th1

a) 2 6 4 3 5 2 8 .3 64

2 2b)

3 5 3 5

Cu 2 nh x2 2x 3m2 = 0 (1).

a) Gi nh khi m = 0.b) Tm m nh c hai nghic) Ch nh 3m2x2 + 2x 1 = 0 (m

phn bi m ngh nh (1).Cu 3. Cho tam gic ABC vung cn t trung tuy

hnh chi nAB, AC; H l hnh chi

a) T hnh g?b) Ch ng n n m n. Xc

tm c nc) Ch ng.

Cu 4. Tm nghi nh 2 3 3 x 3 y 3

64

Cu 1. Cho bia 3 a 2 a a 1 1

P :a 1 a 1 a 1a 2 a 1

a) Rt g

b) Tm a1 a 1

1P 8

Cu 2. M ng t ngB 72km, th ng t h ng l 15 pht. Tnh vt ng c dng n 4km/h.Cu 3. Tm t B c m s y = x2.G C l hnh chi B ln tr nh. Tnh di

tch t

8/14/2019 262 n Thi vo lp 10

36/165


Cu 4 a OA v dy MN vunggc v y trn cung nh MN.

a) Chb) Tnh tch AH.AK theo R.

tnhgi trCu 5. Cho hai s nCh 2y2(x2 + y2) 2

65

Cu 1. Cho bix 1 2 x

P 1 : 1x 1 x 1 x x x x 1

a) Tm rt g

b) Tm cc gi tr nguyn c P x nh n.Cu 2.

a) Gi nh x4 4x3 2x2 + 4x + 1 = 0.

b) Gi2 2

2

x 3xy 2y 0

2x 3xy 5 0

Cu 3. Trong m nh2x

y2

. G

- 2) v c ha) Vi nh d

b) G hnh chi n tr nh.

ChCu 4 tit M D.Gminh r

b) B ng thu n.n c

d) Tm J c n ngocCu 5. Cho hai s n y tm gi tr

c 2 21 1

Ax y xy

.

8/14/2019 262 n Thi vo lp 10

37/165


66

Cu 1.a) Gi nh 5x2 + 6 = 7x 2.

b) Gi nh 3x y 5x 2y 4

c) Tnh18 12

2 3

Cu 2. Cho (P) y = -2x2o thu

A(-1; -2); B(1 1

;2 2

); C( 2; 4)

b) Tm kc) Ch 2 + 1) khng thu

Cu 3. Cho tam gic ABC vung t. T

a) Ch AHD bb) Ch hai gc HCE v HAE bc) Chd) Che) Tnh gc BCA n

Cu 4.Cho hm s th n21f x 3f x

xv

67

Cu 1.

a) Tnh

9 1

2 1 5 : 1616 16

b) Gi3x y 2

x y 6

c) Ch 3 2 l nghi nh x2 6x + 7 = 0.

Cu 2. Cho (P): 21

y x3

.

1A 1; ; B 0; 5 ; C 3;1

3o thu

8/14/2019 262 n Thi vo lp 10

38/165


b) Tm k nh y = kx 3 ti

c) Ch r 2 ctCu 3 tituy Q.

a) Chb) Chc) Ch

CD.

gic ABC.Cu 4. Tm gi tr 2 2A 2x 2xy y 2x 2y 1.

68

Cu 1.

1.Choa a a a

P 1 1 ; a 0, a 1a 1 1 a

a) Rt g

b) Tm a bi 2 .

c) Tm a bi a .

2.Ch 13 30 2 9 4 2 5 3 2

Cu 2 nh mx2 2(m-1)x + m = 0 (1)a) Gi nh khi m = - 1.b) Tm m nh (1) c 2 nghi

c) G x1 , x2. Hy l nh nh 1 22 1

x x;

x xlm

nghiCu 3.Cho tam gic nh n tm O,

P.a) Ch OP vung gc v

b) Tnh di rn l R v tgQAD =3

4.

Cu 4.a)Gi nh ax2 + bx + c = 0 c nghi 1. Ch

nh cx2 + bx + a = 0 c 2 v x1 + x2 0.

8/14/2019 262 n Thi vo lp 10

39/165


b)Tm c n nh x2y + 2xy 4x + y = 0 sao cho y

69

Cu 1.1.Cho

2 2

2

1 2x 16x 1P ; x

1 4x 2

a) Ch2

P1 2x

b) Tnh P khi3

x2

2.Tnh2 5 24

Q12

Cu 2. Cho hai p nh2 2x x 2 0 (1); x 3b 2a x 6a 0 (2)

a) Gi nh (1).b) Tm a v b nhc) V m a nh (2) c nghi 1, x2 th n x1

2 + x22 =

7Cu 3. Cho tam gic ABC vung gc B ll trung tuy n tm H bn knh HA c

tha) Ch ng.b) Ch MAE DAE; MA DE .c) Ch n tm O. T

AMOH l hnh g?d) Cho gc ACB b 0 v AH = a. Tnh di

Cu 4.Gi nh2 2ax ax - a 4a 1

x 2a

. V

70

Cu 1.

1.Rt g 2 3 2 2 3 2 3 2 3 2 2 .

2.Choa b

xb a

v

a) Ch 2x 4 0 .

8/14/2019 262 n Thi vo lp 10

40/165


b) Rt g 2F x 4 .

Cu 2 nh 2 2x 2 x 2mx 9 0 (*) ; x l tham s

a) Gi - 5.b) Tm m

Cu 3. Cho hm s y = - x2

(P); hm s (d).1.V (d) trn cng m m t (d).

-1; -2), b y cho bi nth

3.Tm nhCu 4. Cho tam gic nh hnh chith

1.Ch ti2.Gc DFE (D thu m phn gic trong v H l giao

ng.3.Tia DE c tam gic g th t

AFEK l hnh bnh hnh, l hnh thoi? GiCu 5. Hy tnh 1999 1999 1999F x y z

nh:

x y z a xy yz zx a xyz 0; a 0

71Cu 1.

1.Gi nh, h nh, ph nh2 2x 3y 12a) 2x 6 0 b) x x 6 0 c)

3x y 7

2.T a nghi nh, ph nh, hnh sau:

2 p 3 q 12a) 2 y 6 0 b) t t 6 0 c)

3 p q 7

Cu 2.

1.Ch2 2

1 2a 3 12a 2 2a .

2.Rt g

2 3 2 3 3 2 32 24 8 6

3 2 4 2 2 3 2 3 2 3

Cu 3. Cho tam gic ABC (AC > AB) c AM l trung tuy trnn (O)

n (O) c i

gc A t

8/14/2019 262 n Thi vo lp 10

41/165


n (O) cminh hai t

3.Ch 2 = FI.FA.4.Ch

Cu 4. Rt g

2 2 2 2 2 2 2 2

1 1 1 1 1 1 1 1T 1 1 1 ... 12 3 3 4 4 5 1999 2000

72Cu 1.Gi nh sau

1) 4x 1 = 2x + 5 2) x2 8x + 15 = 0 3)2x 8x 15

02x 6

Cu 2.

1.Ch2

3 2 2 1 2 .

2.Rt g 3 2 2 .

3.Ch2 2

1 13 2 17 2 2 17

2 2 7 2 2 17

Cu 3 n (O)BC t

I.1.Ch2.G gc DEA

b3.Ch4.AT l ti ti ch o khi

Cu 4.1.Cho tam gic ABC c BC = a, AC = b, AB = c, G l tr

l kho

x y z

bc ac ab 2.Gi trnh

25 4 2025

x 1 y 3 z 24 104x 1 y 3 z 24

73

8/14/2019 262 n Thi vo lp 10

42/165


Cu 1.Gi nh

2 2

2

x 2x y 0

x 2xy 1 0

Cu 2. Gi nh (x 1)(x + 2) < x2 + 4.

Cu 3.1.Rut g

1P 175 2 2

8 7.

2.V o c ph nh 2x2 4x m + 3 = 0 (m l tham sv nghiCu 4. Cho tam gic ABC c ba gc nh

n ngo c1.Ch BAM PQM; BPD BMA .2.Ch BA.DP.

3.Gi BPBM

theo a, b, m.

4.Gng.

74Cu 1.

1.Gi nh (x + 1)(x 4) < 0.2.Gi bi nh 1 x mx m v tham s

Cu 2. Gi nh

3 6 12x y x y

1 10

2x y x y

Cu 3. Tm gi tr 2 2P x 26y 10xy 14x 76y 59 . Khiu?

Cu 4. Cho hnh thoi ABCD c gc nh BAD . Vpha ngoi hnh thoi v tam gic

1.Tm tm c n

2.Ch r BD = 2a.sin2

.

3.Tnh gc ABK theo .4.Ch n m

Cu 5. Gi nh2

x x 2 1 1 x

8/14/2019 262 n Thi vo lp 10

43/165

8/14/2019 262 n Thi vo lp 10

44/165


2. Tnh gi tr m s cc gi tr

Cu 4 AB v CD. Ti BD t E, F. G P v Q l trung

AF.

1.Ch Cd c v o th tam gic BPQc di y tnh di

77

Cu 1. Cho a, b, c l ba s

1 1 1x ; y ; zb c c a a b

Ch x + y = 2z.Cu 2 nh ph nh:

x2 (2a 1)x + 2(a tr

Cu 3. Gi nh:

2 2 2 2

2 2 2 2

x xy y x y 185

x xy y x y 65

Cu 4 n (O1) v (O2) c B. V 1) tixc v 2) t 2) ti 1) t

1. Ch2

2

BE AEBF AF

.

2.G v FBC.

3.Ch

78Cu 1.

1.Gi nh:

22

2 1 9 31

5 2 10 4a) b) 2x 1 5x 4x 1

22

2.Gi nh:x y 3 3x 2y 6z

a) b)xy 10 x y z 18

8/14/2019 262 n Thi vo lp 10

45/165

8/14/2019 262 n Thi vo lp 10

46/165


3.G n ccti

Cu 4. Cho 2 2x x 1999 y y 1999 1999 . Tnh S = x + y.

80

Cu 1.

1.Cho2

1 1M 1 a : 1

1 a 1 a

a) Tm tb) Rt g

c) Tnh gi tr 3a 2 3 .

2.Tnh 40 2 57 40 2 57

Cu 2.nh (m + 2)x2 2(m 1) + 1 = 0 (1)

a) Gi nh khi m = 1.b) Tm m nh (1) c nghic) Tm m m h n h

khng ph o m.2.Cho ba s n a > 0; a2 = bc; a + b + c = abc. Ch2 2 2a) a 3, b 0, c 0. b) b c 2a

Cu 3. Cho (O) v m y trn cung l1.Nu cch d 1) qua M v ti n (O2) qua M

v ti2.G n (O1) v (O2). Ch

0AMB ANB 180 . C nh v3.Tia MN c hnh g?

Cu 4. Gi

ax+by=c

bx+cy=a

cx+ay=b

c nghi 3 + b3 + c3 = 3abc.

8/14/2019 262 n Thi vo lp 10

47/165


.7

1;3

1

491

1694

223312

22

3

323

2

15120

4

156

2

1

2

2

2

xxx

xxxC

B

A

)(2

1 2 Pxy

.22

yx

yx

xy

221

8/14/2019 262 n Thi vo lp 10

48/165


43xx

8

1'''

HC

HC

HB

HB

HA

HA

x

xxA

24

442

52

34

1211

yx

yx

8/14/2019 262 n Thi vo lp 10

49/165


AEF

361122

xxx

1,0;11

11

aaa

aa

a

aaA

21

1

23

1

2

1

nn

1,0;1

1

1

1aa

aa

a

aaM

12

2522

xy

yx

8/14/2019 262 n Thi vo lp 10

50/165


yxyxyx

xy

xyx

y

xyx

yS ,0,0;

2:

2

21xy

34

RSCDAB

211

8/14/2019 262 n Thi vo lp 10

51/165


7,113

252

yxx

yxx

1,0;1

1xx

xx

x

xA

2

1x

2

21xy

323232 22 xxxxxx

56145614P

1,0;11212 2xx

xx

xx

xxxQ

1

2

xQ

ayax

yxa

2

41

8/14/2019 262 n Thi vo lp 10

52/165


52

622

2

xx

xxy

347347P

0,0;4

2

babaab

abba

ba

abba

2121 122 xxyy

xxx 24422169 2

4,1,0;2

1

1

2:

1

11xxx

x

x

x

x

xxA

8/14/2019 262 n Thi vo lp 10

53/165


1,0;1

21

2

3

1

2

35

xxx

xx

x

xx

8/14/2019 262 n Thi vo lp 10

54/165


332 1332

132;1

3

31

5

31

15

22

xxx

xx

x

ayx

anyx

3

72

219

42 xx

0;1

1x

xx

xxA

223

1x

8/14/2019 262 n Thi vo lp 10

55/165


cba

SR

4

1;11

1

1

1 3

22a

a

aa

aaaaa

aA

axxxx 139139 22

2;12 qp

3;034321 222 mmmxmxxm

1212 xxxx

12

12

zxy

zyx

8/14/2019 262 n Thi vo lp 10

56/165


3221.

822063. 22

xxxxxxb

xxxxa

2

53;

2

5321 xx

52

53x

499

1...

2...2

19962

22

1

199621

xxx

xxx

8/14/2019 262 n Thi vo lp 10

57/165

8/14/2019 262 n Thi vo lp 10

58/165


ab

ba

aab

b

bab

aN

526;526 ba

3

2

2

1xy

1yx

z

xz

y

zy

x

yx

z

xz

y

zy

xA

222

0

1

122

x

mxx

8/14/2019 262 n Thi vo lp 10

59/165


9303030306666

1,0;1

1

1

1

1

2xx

x

x

xx

x

xx

xT

11xx

8/14/2019 262 n Thi vo lp 10

60/165


01

1212

yxyxmyx

yx

n

n

ba

ba

20012001

20012001122

12

2

yax

ayx

53

4;53

421 xx

44

53

4

53

4P

0122 mxxx

555 22 yyxx

BCAB

22222

22

4.

4.

RrrrRMNb

RrrBCABa

8/14/2019 262 n Thi vo lp 10

61/165


2

1

11

1 2bb

a

aaa

a

aa

222

111

accbbaH

abxbxxax

2sin

2sin

2sin

CBAP

1

11

11

1

nnnnnn

1009999100

1...

4334

1

3223

1

22

1S

0232 xxyy

8/14/2019 262 n Thi vo lp 10

62/165


22

22baabaa

ba

2029

322

32

322

3257

10

0

0

222

xz

z

zy

y

yx

x

xz

z

zy

y

yx

x

R

cbazyx

2

222

24057;24057 NM

AC

HK

AB

HI

8/14/2019 262 n Thi vo lp 10

63/165


x

xF

2

24

1

22

axy

yx

mxx 95

'2

3' RROO

ACBC 2

118

1 1310 xxxP

xxxxP 235

8/14/2019 262 n Thi vo lp 10

64/165


.0;0;:.2

.;0,;2

.1

22ba

ba

baab

abbaQ

nmnmnm

mnnm

nm

nmP

226 xx

51

8

1

44

xyyx

yx

8/14/2019 262 n Thi vo lp 10

65/165


.1;0;1

1

1

13

xxxx

x

x

xM

.12 xx

3

.)21(;21 33

20053

5

3

5

3

52

33

2

33

2

33

cca

ac

bbc

cb

aab

ba

222222222

111

bacacbcbaP

18161443

2

xxxx21443 xx

4

3

4

1x

8/14/2019 262 n Thi vo lp 10

66/165


SSS

AEDE

S

ADDE

S

DE

SS

IH

ADDE

S

21

3321

3

.3

.2

2.1

2cabcab

3

1

933

43222 xxxxxxx

xx

52

129216 22 xxxx 22 29216 xxxxA

24121

1213

yxm

ymx

R2

8/14/2019 262 n Thi vo lp 10

67/165


8050)4(

16)4(2

yxn

ynx

MNCDAB

211

01

33

xy

xyyx

2222

2

1111.3

4..2 2

.1

ODOCOBOA

RBCAD

BCADAB

222224

222224

)9(9

)49(36

baxbax

baxbaxA

8/14/2019 262 n Thi vo lp 10

68/165


2

211

axy

ayx

8/14/2019 262 n Thi vo lp 10

69/165


12

132

2

xx

xx

cb

a

c

a

b

a

.

2

PBCCANABM

BPCANCAMB

R3

a

a

( ) 1y f x x

1x 1x 1x 1x2 1 0

4x x

11

2

1

2

5

122,4 2 2, 4

17 4 2

13 2 1

x y

x y

2 12 02

x x 4 215

1 04

x x

2y x 2y x

3

B

A

8/14/2019 262 n Thi vo lp 10

70/165


2 5 125 80 605 10 2 10 85 2 1 5

2CD

4

8/14/2019 262 n Thi vo lp 10

71/165


2( 3)

3 3 81 812

( )1

y f xx

1x 1x 0x 1x22 1 0x x

11

1;

2

11;

2

AH

AB

AC

BC

1 2 42 33 2 6

x y

x y

2 0,8 2,4 0x x 4 24 9 0x x

2

2

xy 2y x

15 216 33 12 6

2 8 12 5 27

18 48 30 162

BHC

B

A C

H

8/14/2019 262 n Thi vo lp 10

72/165

8/14/2019 262 n Thi vo lp 10

73/165

8/14/2019 262 n Thi vo lp 10

74/165


ANAM

0120sd AN AMNS

12

25 144

( )y f x

( )y f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x22 2 6 3 0x x

2 1 1 06 9

x x23 4 3 4 0x x

2 2

5 3 5 2

x y

x y

2 4 1 0x x m

8/14/2019 262 n Thi vo lp 10

75/165

8/14/2019 262 n Thi vo lp 10

76/165


2

2

xy

1

2y x m

2

2

xy

8 3 2 25 12 4 192 2 3 5 2

2a a

0a 1a 0a( )y f x x R ( )y f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x

1 2 1 2 1 2, ; ( ) ( )x x R x x f x f x2 0ax bx c ( 0)a 2 4 0b ac

1 2;b b

x xa a

1 2;2 2

b bx x

a a

1 2;

2 2

b bx x

a a

8/14/2019 262 n Thi vo lp 10

77/165

8/14/2019 262 n Thi vo lp 10

78/165


nyx

nymx

2

5

13

3

y

x

C

CMD

2

3 2x

3

1

2

1;

3

2;8;

2

9

2

2 2

yx

mmyx

2

321x 2

322x

8/14/2019 262 n Thi vo lp 10

79/165


)..(2

1BCADCDABS

ABCD

x3

0322 xx

2

2

1x

2

4

1xy

12mmxy

ACABrR .

8/14/2019 262 n Thi vo lp 10

80/165

8/14/2019 262 n Thi vo lp 10

81/165


5168143 xxxx

BAM BCA

231 xx

11

3

2

2

22

1

1

1

xy

yx

x

1

8/14/2019 262 n Thi vo lp 10

82/165


BMD BCD

x

09

813

12

xx

xx

22

21 xx

2

2

NA IA=

NB IB

8/14/2019 262 n Thi vo lp 10

83/165


53

3

myx

ymx

13

)1(72

m

myx

22

21 xx

2xx

19

143

1 2xx

8/14/2019 262 n Thi vo lp 10

84/165


221

221

2122

21 322

xxxx

xxxxA

12

72

yx

yxa

22

2 12

1.)

1

1

1

1( x

x

xx

A

12315 xxx

8/14/2019 262 n Thi vo lp 10

85/165

8/14/2019 262 n Thi vo lp 10

86/165


1

2:)

1

1

1

2(

xx

x

xxx

xxA

A 324x

xxx

xxx

xx

61

62

3622

222

2

2

1x

8

1

CDEBCF

13

52

ymx

ymx

yyxx

yx

22

22 1

8/14/2019 262 n Thi vo lp 10

87/165


25

1

25

1

41

2

1

5

71

1

1

2

yx

yx

xxxxxx

xA

2

1:

1

8/14/2019 262 n Thi vo lp 10

88/165

8/14/2019 262 n Thi vo lp 10

89/165


32 1;32 1ba

1;

12

a

bx

b

a

2

2x

21212 xxxx

22 11 xyyxS ayxxy )1)(1( 22

xx 12

8/14/2019 262 n Thi vo lp 10

90/165


2

2x

y

21212 xxxx

512

412

x

x

x

x

2 5

8152 xx

22

21 xx

8/14/2019 262 n Thi vo lp 10

91/165


33

6;

211

9ba

2

532

yx

ayx

7

522

xyyx

xyyx

BD

AC

DADCBCBA

CDCBADAB

..

..

xyyxS

4

3122

322

32

322

32P

8/14/2019 262 n Thi vo lp 10

92/165


2

2

2

1

1

;

1 x

x

x

x

2

32

x

xP

044

3252

22

xyy

yxyx

4

2x

y

4

2x

y

413 xx

8/14/2019 262 n Thi vo lp 10

93/165


0113 22 xx

1 1 1 1 1

A= :1- x 1 1 1 1x x x x

7 4 3

2 3 5 0x x

2 21 2

1 1

x x

2 21 2x x

3 31 2

1 1x x

1 2x x

8/14/2019 262 n Thi vo lp 10

94/165


1 1 2: 2

a a a a a

aa a a a

1 13

2 31

x y x y

x y x y

2 2 2

5 5 25

5 2 10 2 50

x x x

x x x x x

1 1 1 1 1

1 1 1 1 1

a a

a a a a a

8/14/2019 262 n Thi vo lp 10

95/165


AMB HMK

( ) 6

( ) 12

( ) 30

xy x y

yz y z

zx z x

2 3

5 4

x y

y x

3 1 4 4

a > 0 ; a 442 2

a a a

aa a

3 31 2 0x x

8/14/2019 262 n Thi vo lp 10

96/165


2

2

1

x m

x

1 2 5x x

1 1 2( 0; 0)

2 2 2 2 1

x xx x

x x x

8/14/2019 262 n Thi vo lp 10

97/165


3 2 1

5 3 4

x y

x y

22 2 3 3 0x x4 29 8 1 0x x

15 12 15 2 2 3

A

8/14/2019 262 n Thi vo lp 10

98/165


8/14/2019 262 n Thi vo lp 10

99/165


8/14/2019 262 n Thi vo lp 10

100/165


8/14/2019 262 n Thi vo lp 10

101/165


8/14/2019 262 n Thi vo lp 10

102/165


8/14/2019 262 n Thi vo lp 10

103/165


2 9 3 2 1

5 6 2 3

x x xQ

x x x x

8/14/2019 262 n Thi vo lp 10

104/165


1x

11223

6

5

1

1

2

1

yx

yx

11

11

3

x

xx

xxxx

8/14/2019 262 n Thi vo lp 10

105/165


82

2

11

2

3

yx

yx

54

13

5

35

2

)32( 2 xxxx

2

2233

1

)1(:

1

1

1

1

a

aaa

a

aa

a

a

a

223a

8/14/2019 262 n Thi vo lp 10

106/165


8/14/2019 262 n Thi vo lp 10

107/165


8/14/2019 262 n Thi vo lp 10

108/165


8/14/2019 262 n Thi vo lp 10

109/165


P

4123 xmpxm

8/14/2019 262 n Thi vo lp 10

110/165


8/14/2019 262 n Thi vo lp 10

111/165


8/14/2019 262 n Thi vo lp 10

112/165


4222522 xxpx

8/14/2019 262 n Thi vo lp 10

113/165


8/14/2019 262 n Thi vo lp 10

114/165

8/14/2019 262 n Thi vo lp 10

115/165


1

2

2 1.

11 2 1 2 1

x x x x x x x x

xx x x x x

5 3. xPx x

. 1 3 1P x x m x x

1 1 2

1 21

x

x xx

1 1 1

2b c

8/14/2019 262 n Thi vo lp 10

116/165


2

31:

3

1

32

4

x

x

x

x

xx

xxP

1

2

1

1:

1

22

1

1

xxxxxx

x

xP

8/14/2019 262 n Thi vo lp 10

117/165


12:

3

2

2

3

65

2

x

x

x

x

x

x

xx

xP

251

P

8/14/2019 262 n Thi vo lp 10

118/165


8/14/2019 262 n Thi vo lp 10

119/165


OA.3

2

8/14/2019 262 n Thi vo lp 10

120/165


( 1) 3

.

a x y

a x y a

2a

8/14/2019 262 n Thi vo lp 10

121/165


188

Cu 1:Tm rt g

P =

Cu 2:

a) Hy cho hai n tr nh. Vthb) Gi B,c). Tnh cc kho di

Cu 3: Cho tam gic ABC vung t

a) Tnh AC

b) T n AH l AH. TAH. G D. Tnh dic) V n (B, AB) v (C, AC). G nny l E. Ch ti tuy n (B).

189

Cu 1Gi nh:

Cu 2Cho hm s

a) V o c (1) l hm sb) V m cc gi tr m s ng v

2x + 3 = 0?

Cu 3

Cho tam gic ABC vung t ao AH chia c nh hai

H xu AC.

8/14/2019 262 n Thi vo lp 10

122/165


b) Chc) G n (O), (M), (N) theo th p cc tam gic ABC, DHB,

n: (M) v (N); (M) v (O); (N) v(O)?

d) Ch ti n (M) v (N) v l tituy n

190

Cu 1: Gi i ton sau b nh:Hai vi n ng ch o m

N i th vi th bm i ch nh th trong bao lu m

Cu 2: nh x2 - (2k - 1)x +2k -2 = 0 (k l tham snh lun lun c nghi

Cu 3 n tm O n l k

DAB c n t c n t

a) Chb) Ch ng?

191

Cu 1: Ch o x:

A =6 2x

x 6x : 6xx 3

(v

Cu 2:

(d) y = -x

(d') y = (1 m)x + 2 (m 1)

a) V

(-1; 1). V m y tnh di B l Oy.

8/14/2019 262 n Thi vo lp 10

123/165


Cu 3: n (O) v (O), ti i tngoi DE, D (O), E (O). K

AE.

a) T hnh g? V sao?

b) Chc) Ch ti n cd) Tnh DE bi

192

Cu 1:

Gi nh

Cu 2: Gi i ton sau b nh:

M v

ph m 6 b n

Cu 3:

Cho tam gic PMN c PM = MN, 0PMN 80 . Trn nkhng ch QP QM , 0QMP 25

a) Ch

b) Bi

193

Cu 1:

b trong h nhax by 4

bx ay 8, bi

nghi (1 ; -2)

Cu 2:

8/14/2019 262 n Thi vo lp 10

124/165


T i ch chol 16. Tm hai ch

Cu 3:

N ci c N c

a) Ch t

b) Bi n ngo6cm, hy tnh di

1a0;aa1

aa1:a

a1

aa1M

5yx

2

3

x

y

y

x

BMA;M

BOM

8/14/2019 262 n Thi vo lp 10

125/165


043

xxxxxx 23456

0a3ax4a1x 22

2)n,Nn(21

n

11......

4

11

3

11

2

11

2222vi

1131131

1452

8/14/2019 262 n Thi vo lp 10

126/165


AFBE

20354

1ba,0;ba;vi1b

1a:

1a

b21b

13.32.2

43y

2

1x

3

53y

11x

2

2/

42y3x

5y2x1/

CAB,A

8/14/2019 262 n Thi vo lp 10

127/165


kMBAM

81x

xx

22

16a;aa64aa

4a:

16a4a

16a

8/14/2019 262 n Thi vo lp 10

128/165


1x0;xxxxx1

x2

1x

1:

1xx

1A

223x

OBMAOC:CM

Rx52xx

35680x56x16xxP(x) 2

234

(3)0yx3y

(2)yyx

(1)yxyxyx42

)90(0nCBmCA 00

mx)x)(6(3x6x3

8/14/2019 262 n Thi vo lp 10

129/165


43ny2mx

3nymx

347324A

b.yxa0

ab

b)(a)

y

1

x

1y)((x2,

b)(aabx1,2

2

24yy10x5x

1112y3y4x2x(2)

11y5x

13y2x(1)

22

22

8/14/2019 262 n Thi vo lp 10

130/165


ba0;ba;ab

ba

aab

b

abb

aM

060IMA

444 3444 21

01m1)x(2m2x2

OBM NCO

NMB

8/14/2019 262 n Thi vo lp 10

131/165


c

1

b

1

a

12

cp

1

bp

1

ap

1:CM

033yx

0y1x

549045316013

222222444 c2bc2ab2acba

0m1)x2(mx 22

8/14/2019 262 n Thi vo lp 10

132/165


033yx

0y1x

549045316013

3M

)cb2(b

1)ba2(

4zyx

bzx.y.z

azx.y.z

222

2

8/14/2019 262 n Thi vo lp 10

133/165


01512x52x2.

0145xx1. 2

51)y(mmx51)y(mxm 2

6a5a

2a

a2

3a

a3

2a:

2a

3a-1P

3

8/14/2019 262 n Thi vo lp 10

134/165


12yx

x4y2xc/

067xb/x

022xa/2

6342534284546c/C

.324324b/B

yx0;y0;x.yx

xy2

yxy

y

xxy

xa/A

.3m

m1yx

2

2

00

3x3y312

8/14/2019 262 n Thi vo lp 10

135/165


53 3

1 5

a a a a

a a

B ,Rt gn A

2

6 11

9 3x x

2x m

8/14/2019 262 n Thi vo lp 10

136/165


2 2

2 .MH AB AB BH

2

2

5( 1) 11

1 2 2

a a

a a

2 3 4 0x x

2 2 1.

12 1

a a a

aa a a

2

1B

a2 ( 1) 2 3x m x m o

1, 2x x

HMP HMP KQN

1

42

2

4 1.

1

x

x x

8/14/2019 262 n Thi vo lp 10

137/165


2

2 1 0x x

1 22

x y

2

2 1 12

21

x x xx

x

1

42 2 0x mx m m m

1 2,x x2 2

1 2 6`x x

,B A C A

2 2

1 1

1 1x y

2 6 5 0x x

( 32 50 8) : 182 (2 1) 2 0mx m x m

8/14/2019 262 n Thi vo lp 10

138/165


2

2

3 5

1

x

x

4 2 2002 2002x x

9 3 1 1:

93 3

x x x

xx x x x

8/14/2019 262 n Thi vo lp 10

139/165


1 1 1

CN CD CP

4 8 1 2:

42 2

x x x

xx x x x

5

8/14/2019 262 n Thi vo lp 10

140/165


1 2

11 1x y

8 51

1 1x y

21.12212

2

xxx

xxx

42

2

myx

ymx

8/14/2019 262 n Thi vo lp 10

141/165


12

22

m

m

SESDSK

112

0z

c

y

b

x

a

2252

9

52

9

1041310413

8442 xxx

7

1

22

21

21

xx

xx

8/14/2019 262 n Thi vo lp 10

142/165


20052005 22ba

yx

xyyx 4

xy

xyyx

23 23

962 xx

2

4

1x

3

1

4

1

4

1

xx0969 22 xxx

2

1

x03

1

xx

8/14/2019 262 n Thi vo lp 10

143/165


)A

xx

x

x

x

xx

11:

1

32

2

436 xxx

26.3221

2

2

232

23

228

105811541 xxxx

8/14/2019 262 n Thi vo lp 10

144/165


1. yxm

myx

3 3

3

2

8/14/2019 262 n Thi vo lp 10

145/165

8/14/2019 262 n Thi vo lp 10

146/165


16

32a

1

1

1

1

ba 734

1

734

1

12

13:

324

12

2 2 20

14a b ca b c

4 4 41P a b c

8/14/2019 262 n Thi vo lp 10

147/165

8/14/2019 262 n Thi vo lp 10

148/165


D

BAE

F

6 66

3 33

1 12

1 1

( ) ( )

( )

x xx xP

x xx x

1 12 2

1 12 2

yx

xy

M

3 3 3a b c

ab bc cab c a

1 1 1

1 2 2 3 1999 2000....

. . .S

22

13

13

xx

y yx

xy y

3 2 44 1 1 1x x x x x

2 2112 4 4 7 02

( )x a x a

BE DF

AE CF

2 2 2 2

2 2 8 2 2

43( )

( )x y x y

x y y x

8/14/2019 262 n Thi vo lp 10

149/165


2 28 2 4x x2 2

4 2 2 47

21x xy yx x y y

3 2

3 23 193 98

a abb ba

AB

2 2 2 2 2 21

2( ) ( ) ( )P xy yz zx x y z y z x z x y

1 1

22 4

x x x

3 2

3 2

2 12 08 12x xy yy x

2 2 2

1 1 4

R r a

1 1 1 1 1 1

A a b c ab ac bc

3 62 3 4 2 44 16 6.A

00

0

a b cx y zx y z

a b c

8/14/2019 262 n Thi vo lp 10

150/165


8/14/2019 262 n Thi vo lp 10

151/165


22 36

2 3

x x

x

BH

HC

21 1 1 1x x x

3 3

2 28

2 2 2 7x y x y

y x xy y x

10 1016 16 2 2 2

2 2

1 112 4( ) ( ) ( )

x yQ x y x yy x

3 1 2x x

2 2

2 2153

( )( )( )( )x y x yx y x y

3 3 2 2

1 1

( ) ( )( )( )

x y x yP

x y

8/14/2019 262 n Thi vo lp 10

152/165


OB

CN

1

2 2n

n nx

2 3 2 2 4

42 2 2 2( ) : ( )

x x x xP

xx x x x x

2

311

4

x

x

5

2

8/14/2019 262 n Thi vo lp 10

153/165


1 1 1 1

2 2 2 3MK MA MA MB MB MK

8/14/2019 262 n Thi vo lp 10

154/165


2 2

2 22 5 2 0

4 0

x xy y x y

x y x y

2 23 5( )x x4 4 2 23 6 3( ) ( )P x x x x

25 2 1 7 110 3( )( )x x x x

3 2

3 22 3 5

6 7x yx

y xy

2 2 22 1 2y x x y x y xy

3R

2 23 2 3 2 3 2x x x x x x

2 2

3 31

3x y xyx y x y

8/14/2019 262 n Thi vo lp 10

155/165


4 3 16or 5ba b cP

b c a a c b a b c

.IB ICr

ID

8 5 5x x1 1 8

1 1 17( )( )

( ) ( )x y

x x y y xy

1 1 1

1 1 1S

xy yz zx

'

S

S

23 1 1 2( ) ( )x x x x x

2

2 22 32

x xy x yx y

8/14/2019 262 n Thi vo lp 10

156/165


3 3 3

1 1 1 1 1 1 2

1

( ) ( ) ( )x y zy z z x x y

x y z

1 1 1P

x y z

( )( )( )xyz

Mx y y z z x

2 22 5 1 1

1

1 2 4 1 1 2 4 4 1

:x x

A

x x x x x

2

2

2 1989x xy

x

1 1 1 1 1 20001 1 1 1

2 1 3 2 4 3 5 2 2001( )( )( )......( )

. . . ( )n n

2

4 4 4 4

16 81

x x x xA

x x

8/14/2019 262 n Thi vo lp 10

157/165


a b c a b c

b a c b a c b c c a a b

6 2

4

21 1 1 2

1 1 1 1 1( ) : ( )x x x

Px x x x x

2 6 1 0x x

2 3 2 3

8/14/2019 262 n Thi vo lp 10

158/165


2 2 1x y y 24 1 5 14x x x

2 2

3 3

4 4

35917

ax byax byax byax by

5 5A ax by

2001 2001B ax by

3 6

4

2 3 7 4 3

9 4 5 2 5

.

.

xA x

x

1 2 3

1 2 3 11.....

n

n

P P P P

2 22 4 5 2 1 1 0( )( )( )x x a x x a x a

8/14/2019 262 n Thi vo lp 10

159/165


1 1 1P

x y z

2004 6 6

2004 6 6

2004 6 6

222

x y zy z xz x y

2 2 3 3 1 3 4 1 2

3 41 2 1 3 2 1 2 3 3 1 3 2

( )( ) ( )( ) ( )( )

( )( ) ( )( ) ( )( )

x x x x x xx

2 23

2x y xyx y

4 3 2 3 2 11x x x

8/14/2019 262 n Thi vo lp 10

160/165


4

4 4 41 ( )zP

z x y

259

O 10 T 2009

Kho thi ngy 26/6/2008 - ThCu I:1) Gi nh sau:

a) 5.x 45 0 b) x(x + 2) 5 = 0

2) Cho hm s2x

2

a) Tnh f(-1)M 2;1 c n m s sao ?

Cu II:1) Rt g

P = 4 a 1 a 11 .a a 2 a 2 v a 4.

Cu III:T

th s t b 23

s

Cu IV:

n tm O. L n (O),

n (O) tc n (O) tv

1)Ch2)G n (O). Ch

minh DM AC.3)Ch 2.

Cu V:Cho biB = (4x5 + 4x4 5x3 + 5x 2)2 + 2008.

8/14/2019 262 n Thi vo lp 10

161/165


Tnh gi tr 1 2 1.2 2 1

260

S PT CHUYNQU -2009

Mn TONTh m bi 150 pht ( khng k

Bi 1 :

a) Th35

126320103 .

b) Tm gi tr 2008xx .Bi 2 :

Cho h nh:5myx3

2ymx

a) Gi nh khi 2m .b) Tm gi tr nh cho c nghi n

h3m

m1yx

2

2

.

Bi 3 :

a) Cho hm s 2x2

1y (P). Vi nh

N n n (P) l 2 v 1.b) Gi nh: 1xx2x3x3 22 .

Bi 4 :Cho hnh thang ABCD (AB // CD), giao

th BC l N.a) Ch : 1

AB

MO

CD

MO .

b) Ch .MN

2

CD

1

AB

1

c) Bi 2COD2

AOB nS;mS . Tnh ABCDS theo m v n (v CODAOB S,S ,

ABCDS l di gic COD, diABCD).

8/14/2019 262 n Thi vo lp 10

162/165


Bi 5 n ( O; R ) v dy cung AB cn cung l BC lun song song. G

BD. Cha) T tb) OM BC.

song song v

Bi 6 :

a) Cho cc s yxx

y

y

x 22 .

b) Cho n l s n l n4 4n l h

261

S H NG

K- 2009

MN THI: TON

Th m bi 120 pht, khng k

Ch :

-

- H m bi vo t

Ph

1. Bi 21 4xx

gi tr o c

A. x 14

B. x 14

C. x 14

v x 0 D. x 0

2 o song song v - 2x?

A. y = 2x - 1. B. y = 2 (1- 2 x).

C. y = 2 - x. D. y = 2(1- 2x).

CHNH TH

8/14/2019 262 n Thi vo lp 10

163/165


3. Hai h rnhx 3 3

1

k y

x yv

3x 3 3

1

y

x y

A. -3 B. 3 C. 1 D. -1

4 - 2 ; 1

2) thu m s o trong cc hm s

A. y = 22

x2 B. y = 222

x

C. y = 224

x D. y = - 224

x

5. Tam gic GEF vung t

i EF b

A. 13 B. 13 C. 2 13 D. 3 13

6. Tam gic ABC vung t 3

A. 32

a. B. 12

C. 32

D. 12

a

7. Cho tam gic ABC vungt n

ngo

A. 30 cm B. 15 2 cm C. 20 cm D. 15 cm

8. Cho tam gic ABC vung t

vng quanh c nh nn. Di tch ton ph nh nn

A. 96 cm2 B. 100 cm2

C. 144 cm2 D. 150 cm2

Ph

nh b x : x 2 4x + m + 1 = 0.1. Gi nh khi m = 3..2. V o c nh c nghi3. Tm gi tr nh cho c 2 nghi 1, x2 th

mn 12 + x2

2 = 10.

Gi nh:3 2 2 1

2 2 3

x y

x y

8/14/2019 262 n Thi vo lp 10

164/165

8/14/2019 262 n Thi vo lp 10

165/165

M ng i 80 km trong m ng ng n

lng

Bi 4 : ( G m A, C B). Trn cng mn By cng vung gc vAB. Trn tia Ax l A), tia vung gc v

n1/ Ch

a/ T n. Xctrn

b/ AI.BK = AC.BC

c/ APB vung.2/ Cho A, I, B c m v

Bi 5 : ( Tm x n 1003x + 2y = 2008

------------------- H ------------------

Documents

262 ĐỀ Ôn Thi vÀo lỚp 10