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Page 1: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4
Page 2: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

:

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8 / 15 2 56

9 / 11 2 28

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2

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34 / 3 2 2 27 10 2

35 / 5 3 7 8 2 7

36 / 2. 8 3 7 11 4 7

37 / 2. 3 5 20 6

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:

1/ 32 3 57 40 2

2 / 33 10 49 20 6

3 / 67 10 21 12 3

4 / 262 20 106 20 6

5 / 152 2 601 20 6

6 / 3 5 13 48

7 / 4 10 2 5 4 10 2 5

8 / 8 2 10 2 5 8 2 10 2 5

9 / 3 5 13 4 3 2 3 1 3 2

10 / 4 9 4 2 2 2 1 2 1

11/ 2 3 3 5 8 2 15

12 / 5 2 3 4 2 32 3 57 40 2

14 / 67 10 21 12 3 8 3 7 3 1

15 / 1 4 3 5 2 3 33 10 49 20 6

16/ 5 10 2 3 2 29 12 5

17 / 9 5 3 5 8 10 7 4 3

18 / 2 3 5 13 48 : 6 2

13 / 13 30 2 9 4 2 19/ 11 3 13 6 2 30 54 11 10 6

:

1/ 2 28 2 63 3 175 112

2 / 2 2 3 18 4 32 2 50

3 / 3 18 98 288

4 / 2 18 4 27 3 45 6 32 5 48 3 20

5 / 12 4 48 243 2 147

1 26 / 243 12 75 147

2 7

3 1 2 17 / 5 28 7 45

4 3 3 4

8 / 2 28 3 63 700

9 / 3 50 2 98 5 18 63 2 28

10 / 2 3 2 2 32 6 4 2

11/ 12 2 35 4 20 28

12 / 50 3 98 2 8 3 32 5 18

513 / 162 2 72 18

3

114 / 4 20 5 45 3 125 15

5

1 3 215 / 24 6

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2

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120 / 72 4 32 162

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1 33 121/ 48 2 75 5 1

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2 5110

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29 / 2 242 8

3 3 54 227 3

Page 4: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

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3

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x x

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1/ 1 1

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37 40

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7/ 5 3 2 2 3

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47/

2

2 3 72 3

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3 322 2

72/ 5 11

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73/ 3 1 3 1

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74/ 3 5 1

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75/2 1

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77/ 3 2 3 2 8 6 8 3

3 2 3 2 2 178/ 10 3 11 3 11 10

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87/23 4

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88/2 3 5. 3 5 15 5

10 2 12 2

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90/ 6 10 4 15 91/ 14 6 5 21

92/ 14 6 21 5 5 21

93/ 4 15 10 6 31 8 15

Page 6: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

94/ 7 3 3 7 2

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Page 7: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

29/ 10 5

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Page 8: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

66/ 3x

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Page 11: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

1

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1 2).

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1) t 1.

:

a/ 2

4 7 32 10 7

b/ 12 6 3 24 . 6

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2

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9 4 5 5 3

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1

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1 2 7 8 2 7

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Page 12: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

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x2).

1 2

1 2).

3 2

4 1

2

:

a/ 2

5 2 22 4 10

b/ 1 3 3

27 63 3

c/ 728321

d/ 2 2

3 5 7 3 5

13

14

x2).

1 2

Page 13: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

1 2).

3 2

4 1 2

: a/ 8 60 8 60 b/ 1 7 7

42 1127 1 7

c/ 627212 d/ 27 3 2 12 6

3 2 3 3 3

1

y = 1 2).

1 2

1 2).

3 2

4 1

2

:

a/ 2

3 5 2 51 10 2

b/ 2 3

96 6 10 4 63 3 6

c/ 4 15 10 6 4 15

d/ 1 6 2 4

1758 7 3 2

Page 14: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

1:2

2:2

80m. 3

5 195m2

1) 2 8

2

x y

x y

2) 2 5

3 20

x y

x y

3) 2 3 13

4 5

x y

x y

4) 2 3 6

5 2 23

x y

x y

5)

5 2 3 99

3 7 4 17

x y x y

x y x y

6) 5 2 5 5

5 5 5

x y

x y

7) 7 7 3

5 5 2 0

y x

y x

4m 42

m2

1) 8

2 2

x y

x y

2) 3 2 4

2 20

x y

x y

3) 2 3 13

4 5

x y

x y

4) 2 3 13

3 5 9

x y

x y

5)

3 2 5 9

3 4 7 5

x y x y

x y y x

6) 2 3 2 2

2 2 4

x y

x y

7) 3 7 2

5 3 2 0

y x

y x

84m2

1) 2 3

6

x y

x y

2) 3 4 11

5 6 20

x y

x y

3)

1 2

3 3

3 2

x y

x y

4) 3 5 11 0

5 4 1 0

x y

x y

5) 2 6

2 2 3 8

x y

x y

6) 2 3 3 2 5 3

4 4 2 3

x y

x y

2

1) 2 3 1

4 7

x y

x y

2) 1234

823

yx

yx

3)

3 1

2 2

3 2 1

x y

x y

4) 4

3 2 7

x y x

x y

5) 3x 2y 5

x y 2

6) 2 1 2

2 1 1

x y

x y

2

1)311110

7112

yx

yx4)

2 1

7 3 4

x y x

x y x y

2

sau:

1) 1y2x9

2yx24)

2 5

3 1 3 2

x y y

x y y

Page 15: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

2)x 0,5y 2

2x y 45)

1)51(

25

yx

yx

3)

2 5 2

21

5

x y

x y6)

2 1 2 3 2

2 3 2 1 2

x y

x y

2)

3)

2 35

3 7

3 2 5

x y

x y

5) 2 3 3 2

2

x y

x y

6) 5 0

5 3 1 5

x y

x y

2

2:

1) 3 2 10

2 4

x y

x y4)

2 11

3 31 8

x y y

x y y

2) 5) 3 3

2 2 3

x y

x y

3)

1 52

6 14

5 2 1

x y

x y

6) 4 3 2 2 3 3 1

2 2 3 3

x y

x y

:

2

2:

1) 2 3 13

4 5

x y

x y4)

3 4 5

2 3 2 1

x y y x

x y x y

2) 3 2 0

2 6 1 0

x y

x y

3) 1

2 3

5 8 3

x y

x y

5) 2 6

3 3

x y

x y

6) 3 1 1

3 1 3

x y

x y

2.

1) 9

3

yx

yx

2) 2 3 2

5 2 3

x y

x y

3)

64 5

015 12

y x

x y

4) 5 2 3 1

2 4 3 5 12

x y x

x x y

5) 62222

2623

yx

yx

6) 1 2 3

1 2 1

x y

x y

2

1) 13

3

yx

yx

2) 842

1223

yx

yx

3)

3 22,3

4 5

30,8

5

x y

yx

4) 1 1

2 1

x y xy

x y xy

5) 63333

3432

yx

yx

6) 3 2 2 6 2

2 4 20

x y

x y

:54 5

3

1)

2) 123

43

yx

yx

3)

2

3

10 0

x

y

x y

4) 2 3 3 1 1

3 1 2 2 3

x y

x y x

5) 422

2232

yx

yx

6) 3 2 2 7

2 3 3 2 6

x y

x y

H

2

1) 3

3 2 5

x y

x y

2) 3 2 8

6 9

x y

x y

3)

2 3 4

3

10

x y

x

y

4) 3 9 2

2 3 11

x y x y

x y x y

5) 3 5 6 5

4 5 2

x y

x y

6) 5 2 3 5

2 6 2 5

x y

x y

Page 16: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

100 21 10m2.

1) 2) 2 4 0

3 6 12 0

x y

x y

3)

3 741

4 3

5 311

2 5

x y

x y4)

5 2 3 99

7 3 17

x y x y

x y x y y

5) 2 3 5

2 2 2

x y

x y6)

3 5 4 15 2 7

2 5 8 7 18

x y

x y

5 42 8m2

1) 5

13

x y

x y

2) 3 18

10 5

y x

y x

3) 2011 2010 4021

2010 2011 4021

x y

x y

4) 3 5 12

5 2 11

x y x y

x y x y

5) 2 2 3 5

93 2 3

2

x y

x y

6) 2 5

2 1 10

x y

x y

1) 2 3

3 7

x y

x y

2) 13 3 10

18 32 40

y x

x y

5) 3 2 3

3 3 6

x y

x y

6) 3 2 4 2

5 3 2 0

x y

x y

3) 2 3 2 4 5 3 2

4 3 2 7 3 2 2

x y

x y

4)

2 1 2 1

4 3 12

5 74

2 3

x y

x y

1) 3 4 1

5 4

x y

x y

2)

2 3 1

22

x y

xy

5) 2 2

2 2 4 2

x y

x y

6) 2 6 9 5 3

2 3 5

x y

x y

3)3 1 7 3 0

5 3 12

x y

x y x y

4)

3 2 5 3

5 3

2 3 4 31

3 2

s t s ts t

s t s tt

, n hai 2 60m2

2

1) 5

2 4

x y

x y

2) 2 5

3 1

x y

x y

4) 2 3 1

5 2 4 3 8

x y

x y

5) 5 5 3 1

2 3 3 5 21

x y

x y

3) 1 1 2

1 2 2

x y x x y x xy

y x y y x y xy

, n2m

42m2

2

1) 2 5

4

x y

x y

2) 3 7 7

2 5 5

x y

x y

4) 2 2 3 3 5

2 6 5 2

x y

x y

5) 1 2 1 2 5

1 2 1 2 3

x y

x y

3) 3 2 5 2 7 1

4 1 3 6 6 1 2 3

x y x y

x y x y

Page 17: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

1: 2mx a/ hai ng

t x1, x2

A = 2 2 2 21 2 1 2 1 2x x x x x x

1 > x21

2

2

3

x

x.

2: 3x m2

a/ 1, x2

3 31 2x x 27 .

3: Cho x2 (m 1)x m 2 = 0 a/ x1, x2.

2 21 1 2 24B x x x x

4: 2x m2 + 4m a/

t x1, x23 31 2A x x .

5: 2mx 3m2 + 4m a/

x1, x2

1 2A x x

6: C (2m + 1)x +a/

x1, x2

2 21 2 1 27x x x x

: x2 (2m 1)x + m2 m a/

1 2;x x R.

b/ = 6x1x22 21 2x x

: Cho (m + 2)x m a/ 1, x2

.

b/ A = 2 21 2 1 2x x x x

: x2 6x m2 + 8m 7 = 0

1, x2 sao 3 31 2x x

: Cho 22x (2m 1)x m 0

1 2x , x .

1 2x , x 3 31 2x x = 0.

21 2

1 2

(x x ) 7A

x x 1

11: Cho x2 4x + m a/

2 2 2 21 2 1 2

5A

x x x x

12: Cho x2 mx + m a/

x1, x2.

1 2 1 22 21 2 1 2

2 7 2 2

2 1

x x x xA

x x x x

13: Cho x2

2 21 2 1 2x x 4x x 3

.14: 1)x m

hai m x1, x2

2 21 2 1 2 1 23 1A x x x x x x

15: Cho x2 2x + m a/

x1, x2.2 2 2 21 2 1 2 1 2x x x x 3x x

.16: Cho x2 (m + 2)x + m

x1, x2

2 21 2

10A

x x

17: Cho 2(mx + 1) x2

x1, x2

2 21 1 2 2

6A

x x x x

18: Cho x(x 2m) = 2

x1, x2

2 21 2 1 2

48

6K

x x x x

Page 18: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

19: 2mx 4ma/ 1, x2

2 21 2 1 2A x x x x

20: (2m 1)x + m2

a/ 1 2;x x .

b/ 21 22 1 8x m x

21: (2m a/ 1 2;x x .

b/ 21 22 1 8 17 0x m x m

: Cho x2

a/ Ch x1, x2

1x2 4x1 = 2.23:

a/ x = -.

b/

x1, x23 31 2 35x x .

24: Cho 3(mx + 1) x2

x1, x2

2 21 1 2 2

18

4A

x x x x

25: Cho x2 (m + 1)x m

x1, x22 21 2 1 2 1 23 3P x x x x x x

26: Cho x2

x1,

x22 21 2x x

27: Cho x2 (m 1)x + 2m x1,

x2

1 2

2 1

5

2

x x

x x.

: Cho x2 2x + m 3 = 0

1, x2.2 2 2 21 2 1 2 1 23A x x x x x x

: Cho x2 + (2m 1)x + m2 = 0

1, x2.2 21 22 1A x m x m

: Cho x2 + 3x + m 1 = 0

1, x2.4 4

1 1 2 21 32 1 3x x x x

: Cho x2 2mx + m2 m + 1 = 0a/ b/ x1, x2.

1 2 1 2A x x x x

: Cho x2 (2m + 3)x + m2 + 3m + 2 = 0 .

b/x1, x2 R.

: Cho x2 4x + 5m2 + 2m 3 = 0

1, x2.2 2

1 2 1 23 x x x x

: Cho x2 2(m + 4)x + m2 8 = 0

1, x2.2 21 2 1 2x x x x

: Cho x2 2(m 1)x + m2 4m 1 = 0

1, x2.2 2

1 2 1 2x x x x

: Cho x2

x1, x2

2 21 2 1 2

9

3A

x x x x

: Cho 2(mx + 1) x2

1,

x2

2 2 2 21 1 2 2 1 24 2 4 2 2A x x x x x x

: Cho x2 4x + m = 0 a/ x1, x2.

3x1 2x2 = 7.: Cho x2 2(2m + 1)x + 3m2 + 6m = 0

a/

x1, x22 21 1 2 2 14x x x x .

x1 = 2x2.: Cho x2 (2m 3)x + m2 2m + 1 = 0

a/ c x1, x2.

1 5x2 = 16.: Cho x2 2x 2m2

x1, x2

2 21 24x x .

Page 19: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

: Cho x2

a/ x1, x2.4 41 2 17x x .

: Cho x2 2mx + m2 m

x1, x2

1 2 8x x .

: Cho x2 + 2mx 2m

x1, x22

1 2 2x x x

: 2 2x 2 2m 1 x 3m 4 0

a/R.

b/ 1 2;x x

82 2122

21 xxxx .

: x2 2(m 1)x 3 + m2

a/ m. b/ A=x1x2 + 2x1 + 2x2 nh nh t

: x2

a/R.

b/ 1 2;x x

1 2x x

: 4x2 + 2(3 2m)x + m2 3m + 2 = 0 a/b/ .

: x2 2(m + 1)x + m2 + 3m 2 = 0 a/ 1, x2.

b/ 2 21 2 1 2x x x x 22

: (m 1)x2 2(m m 1)a/

1, x2.b/ 1 = 0, khic/

50: (3m 2)x 3m 1, x2 1 5x2 = 6.

1: 4m 320m2

?2: 2.

3: 128m2

4: chu vi 140m 1176m2 ao.5: 5/3 240m2 ?6: 2/3 150m2

7: c 280m. 2

8:

.000.

sau v12:

286.650.000 ?

Page 20: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

a/ 2x2 5x 7 = 0 b/ x2 4x 5 + 20 = 0

c/ 2 3 5 15 0x x

d/ 4x4 12x2 + 9 = 0

2: Cho (P) : y = 21

4x (D) : y =

12

2x

3: Cho x2 2mx + m 2 = 0 .a/

x1, x2 m.

1 2x x , 1 2x x , 2 21 2x x theo m.

A = 2 21 2 1 2

24

6x x x x

1:

a/ 2x2 + 5x 7 = 0 b/ x2 2x 5 + 5 = 0

c/ 2 3 5 15 0x x

d/ 9x4 12x2 + 4 = 0

2: Cho (P) : y = 2

4

x(D) : y =

12

2x

3: Cho x2 3mx + 3m 2 = 0 a/

x1, x2 m.

1 2x x , 1 2x x , 2 21 2x x theo m.

A = 2 21 2 1 2

24

6x x x x

1:a/ 4x2 + 9x = 0 b/ 2y2 8 = 0

c/ x2 + x = 12 d/ 3x2 2x 6 + 2 = 0

e/ 2 2 5 10 0x x

f/ 2 1 5 5 0x x

g/ x4 3x2 = 2

h/ 2 2 5

5 3 6

x x x

2: a/ (P) : y = 2

2

x.

.3: Cho x2 mx + m 1 = 0 .

a/ x1, x2 m.

theo m.

A = 2 21 2 1 2x x x x .

1:a/ 2x2 3x = 0 b/ 3x2 + 5x + 1 = 0

c/ (x + 2)2 = 4 x d/ 3x2 2(x 3 + 1) = 0

e/ 2 2 3 2 2 6 0x x

f/ 25 3 1 4 3x x

g/ 3x4 2x2 20 = 2x4 3x2

h/ 24 2

1 1 2

x x

x x x

2: a/ (P) : y = 2

4

x.

2.3: 2 2mx + 2m 1 = 0

.

1, x2

theo m.

A = 2 21 2 1 2x x x x

1:

a/ 8

3x2 + 27x = 0 b/ 4a4 9a2 = 0

c/ 9x2 = 4(3x 1) d/ x2 + 5 = x 2

e/ 2 2 3 2 3 0x x

1:

a/ 2 x3 3 x2 = 0 b/ 9t4 4 = 0

c/ (x 3)2 = 10 4x d/ x2 = 2(3 + x 3 )

e/ 2 3 3 2 3 6 0x x

f/ 26 5 3 6 4 6 5x x

Page 21: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

f/ 25 2 5 2 10 0x x

g/ 9x4 + 8x2 1 = 0

h/ 2

10 2

2 2

x x

x x x2: a/

(P) : y = 21

2x (D) : y = x + 4.

.

.3: Cho x2 2x m2 1 = 0

x1, x2

theo m.

c/ 211

21 xx.

1(x1 2) + x2(x2 2)

g/ 3x2 + 7 = 4x4

h/ 3 2

12 3x x

2: a/

(P) : y = 4

2xv (D) : y = 3x + 5.

.

.3: 2 (m + 2)x + m + 1 = 0

.

1, x2

theo m.2 21 2x x 3x1x2 = 1.

2 21 2

10

1x x

1:

a/ 4b2 5b = 0 b/ 3x2 x 2 = 0

c/ x2 + 2x 63 = 0 d/ 7x2 + 1 = 2x 7

e/ 2 3 6 3 2 0x x

f/ 29 2 5 3 2 3 1 0x x

g/ (2x2 1)2 = x2 + 2(x4 1)

h/ 5 2

22 3

x

x x

2: Cho (P) : y = 2

4

x(D) : y = 1x

(P). .

3: Cho x2 + mx + 2m 4 = 0 a/ C 1, x2

theo m.i m = 1.

.e/ x1 2x1x2 + x2 = 5.

1:

a/ 2c2 5 = 0 b/ 2x2 x 3 = 0

c/ 3x2 = 21 2x d/ x2 5x + 4 + 2 =0

e/ 23 6 1 2x x

f/ 2 6 3 6 4x x

g/ 3(x4 + 1) = 10x2

h/ 2

14 11

9 3x x

2: Cho (P) : y = 21

4x (D) : y =

1

2x + 2.

a/ b/

A(2 ; 1).3: Cho x2 + mx + m 1 = 0

a/ C 1, x2

theo m.

c/ 2 21 2 1 2x x x x

1:

a/ 7x4 42x2 = 0 b/ x2 83 = 0

c/ 2(3x + 4) = 5x2 d/ 6x2 2x 3 1 = 0

e/ 22 1 2 2 2 0x x

1:

a/ 36x4 49 = 0 b/ 2x2 3 6x = 0

c/ 1 = 2x(2x 1) d/ 5x2 3(2x 5 3) = 0

e/ 2 4 5 2 1 5x x

Page 22: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

f/ 21 2 2x x

g/ (5x2 + 2)2 = 3(10x2 + 1)

h/ 16 30

33 1x x

2: (P) : y = 2

3

x

. (D) M.

3: 2 3mx + 3m 4 = 0

x1, x2

theo m.c/ 1 x2 theo m.d/

.

f/ 22 5 5 1 0x x

g/ x4 29x2 + 100 = 0

h/ 7 4

13 2 3

x x x x

2: (D) song

song (d): y = 12

x(P) :

2

2

xy .

3: Cho x2 2mx + m 2 = 0 .

x1, x2.b/ theo m.c/

x1, x22 21 2 1 2x x 5x x 18

d/ 2 2

1 2 1 2

24

6x x x x

1:

a/ 2x2 2x = 0 b/ x4 2 18 = 0

c/ x2 = 6(x 1) d/ 4x2 4x 5 + 5 = 0

e/ 2 2 3 1 4 3 0x x

f/ 25 1 2 5 5 1x x

g/ 3(x2 + 18) = x4

h/ 12 8

11 1x x

2: Cho (P) : y = 2

4

x(d) : y =

1

3x 1.

a/ b/

M 2.3: 2 (2m 1)x m = 0

a/ x1, x2 .

theo m.

d/

x1, x2 th 2 21 2 1 2x x x x 2

1:

a/ x2 3 6 2 x = 0 b/ 16x4 25x2 = 0

c/ 2x2 + 5x 1 = 0 d/ 2x(x 3 ) = 11

e/ 24 2 3 1 3 0x x

f/ 23 2 5 3 5 2 0x x

g/ 5(x4 1) = 24x2

h/ 2 6

35 2

x

x x

2: Cho (P) : y = 2

4

x(D) : y = x + 1.

a/ .b/

-4.3: ng 2 + (2m 1)x + 3m 4 = 0

.a/ x1, x2 .

theo m.c/

x1, x22 21 2 1 2x x x x 5

d/

1:

a/ 25x2 16 = 0 b/2

1

4

3x = 0

c/ 3(x2 + 4) + 5x = 0 d/ 3 x2 6x + 5 2 = 0

e/ 2 3 2 6x x

1:a/ 7 = 0 b/ x4 + 11x2 = 0

c/ 4x2 5(4x 5) = 0 d/ x2 2 2 = 2x 3

e/ 2 3 2 3 4 0x x

Page 23: 26 13 - Hoc360.net · 1/ 32 3 57 40 2 2/ 33 10 49 20 6 3/ 67 10 21 12 3 4/ 262 20 106 20 6 5/ 152 2 601 20 6 6/ 3 5 13 48 7/ 4 10 2 5 4 10 2 5 8/ 8 2 10 2 5 8 2 10 2 5 9/3 5 13 4

f/ 21 2 2 1 2 1 3 2 0x x

g/ x4 = 8(x2 + 6)

h/ 3 3

2 13

x xx x

2: Cho (P) : y = 2

2x

a/b/ Cho A -3.

i (P).3: Cho (m + 5)x m

a/ 1, x2

b/ 1, x2 theo m.

c/ 2 21 2 1 2x x x x

f/ 2 2 2 1 1 2 2 0x x

g/ 3x2(3x2 + 2) + 1 = 0

h/ 2 2 2

2 1 4

4 2 2

x

x x x x x

2: Cho (P) : y = 4

2x

3

1x 2.

a/ .

B -2.: (4m + 1)x + 2(m 4) = 0

i m = 1.

ph 1, x2

1, x2 theo m.2

1 2 65x x .