Giúp với ạaaa mik cần gấp lắm ạ
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Những câu hỏi liên quan
24 tháng 11 2021
Ta có : |x - 2| ; |x - 5| ; |x - 18| ≥0∀x∈R≥0∀x∈R
=> |x - 2| + |x - 5| + |x - 18| ≥0∀x∈R≥0∀x∈R
=> D có giá trị nhỏ nhất khi x = 2;5;18
Mà x ko thể đồng thời nhận 3 giá trị
Nên GTNN của D là : 16 khi x = 5 ok nha bạn
24 tháng 11 2021
x^2/x-1 = x^2-4x+4/x-1 + 4 = (x-2)^1/x-1 + 4 >= 4
Dấu "=" xảy ra <=> x-2 = 0 <=> x = 2 (tm)
Vậy GTNN của x^2/x-1 = 4 <=> x= 2
k mk nha
DT
Đỗ Thanh Hải
CTVVIP
27 tháng 11 2021
1 were - would you play
2 weren't studying - would have
3 had taken - wouldn't have got
4 would you go - could
5 will you give - is
6 recycle - won't be
7 had heard - wouldn't have gone
8 would you buy - had
9 don't hurry - will miss
10 had phoned - would have given
11 were - wouldn't eat
12 will go - rains
13 had known - would have sent
14 won't feel - swims
15 hadn't freezed - would have gone
E
3
L
27 tháng 12 2020
Mình làm không biết đúng không. Bạn thông cảm 
27. instruction
28. fashionable
29. Religious
30. Proud
31. enjoyable
32. restful
33. interesting
34. interested
35. entrance
36. picnicking
37. heroes
38. enjoyably - rested
40. enjoyment
41. villagers
42. relaxing
43. restful
44. collection
45. difficulties
46. improvement
47. reputable
48. advertisement
49. qualification
50. do not practice - will not get
L
27 tháng 12 2020
51. spending
52. would return
53. speaker
54. got - sleeping
55. invention
56. informative - entertaining
57. popular
58. interacted
59. viewers
60. inconvenience
61. costly - consuming
62. pitiful
63. respondent
64. communication
65. informative
66. interaction
67. popular
68. being widened
69. interesting
70. inventor
71. quality
72. development
73. peaceful
74. economical
75. separatism
76. impressing
77. friendless
78. religion
79. interested
80. qualified
81. impolite/unpolite
82. relaxing
83. reputation
84. hurriedly
CB
6
DT
Đỗ Thanh Hải
CTVVIP
27 tháng 11 2021
1 had stayed
2 were
3 arrive
4 would have bought
5 would go
6 comes
7 had thought
8 gets
9 will become
10 had known
11 hurries
12 would change
13 would have trusted
14 doesn't study
15 weren't
