`y=(mx+9)/(x+m)`

`y'=(m^2-9)/((x+m)^2)`

`y' > 0 forall x \in (2;+\infty)<=>` $\begin{cases}m^2-9>0\\-m ∉ (2;+\infty)\\\end{cases}$ `<=>` $\begin{cases}m>3 \vee m <-3\\ m≥2\\\end{cases}$ `<=>m>3`

Vậy `m>3`.

They are not accustomed to driving on the left in England.

PT có nghiệm `<=> \Delta. >=0`

`<=> m^2-(m^2-m-3) >= 0`

`<=> m+3 >=0`

`<=> m >=-3`

- Đề sai ?

1. Although the weather was bad, we...
2. Though Benny was ill, he went...
3. Inn spite of my mother's business, she cooked...
4. Despite studying hard..., I still...
5. I have so many cavities despite brushing my teeth regularly.
6. Although the god was heavy, we....
7. Despite playing well, we...
8. The elevator was...stairs although we were exhausted.
9. She still loves her husband in spite of having broken up.
10. Despite having lived in France...years, I can...
.
1. I couldn't sleep despite being tired.
2. Despite having got an....
3. Although her foot was injured, she...
4. The salary was low; however, I decided to accept the job.

6. Even though I haven't eaten for 24h...
7. She was tired; however, she went to work.
8. Despite the bad weather, they went...walk.
9. Although her hand was injured, she...write.
10. Even though she has..money, she is very mean.
11. Although Linda was tired, she went on...
12. She is so nice; however, I don't...
13. Though I didn't like the film, everybody else...
14. Despite his absence, we...
15. Nonetheless he is popular, he always...
.
1.
1-D
2-A
3-G
4-E
5-H
6-B
7-F
8-C
2.
1. A
2. B

- Phải là loại 3 mới đúng chứ nhỉ ?

- Chết, đánh số sai lung tung. '-'

37. The dress which her father gave her on her birthday is a beautiful dress.

(Mệnh đề quan hệ)
398. She reminded me to bring my passports with me when I went abroad.

remind sb to V: nhắc ai đó làm gì
29. We had a three-hour flight to Moscow.

flight lasted 3-hour = 3-hour flight 
40. If we had a visa, we could travel to Russia.

Câu điều kiện loại 2: không có thật ở hiện tại.

Brenda told Chris not to mention that ever again.