Hey Mom and Dad,

Greetings from beautiful Vietnam! I just wanted to send you a quick postcard to let you know that I've arrived safely and I'm having an amazing time here. I'm currently in the charming city of Hoi An, surrounded by colorful lanterns and ancient architecture. The food here is incredible, and I've been trying all the local specialties. Tomorrow, I'm planning to visit the nearby ancient ruins of My Son. I can't wait to share more about my adventures when I see you. Sending you lots of love!

Take care,
Nam

Hey Isabel,

Greetings from my holiday in the beautiful coastal town of Portofino, Italy. The weather here is absolutely perfect, with sunny skies and gentle sea breeze. So far, I've enjoyed exploring the charming streets, indulging in delicious Italian cuisine, and taking boat trips along the stunning coastline. Can't wait to tell you more when I see you!

Take care,
[Your Name]

Hey Hannah!

I hope you're doing well. It's great to catch up with you. I wanted to share all the exciting details about my last holiday.

I went to the beautiful island of Bali in Indonesia. It was absolutely stunning! The beaches were pristine, and the lush greenery all around was breathtaking. I spent my days exploring the vibrant local markets, indulging in delicious Balinese cuisine, and soaking up the sun on the stunning beaches. I even had the opportunity to try out some surfing lessons, which was quite an adventure!

The highlight of my trip was definitely visiting the iconic Uluwatu Temple and witnessing the breathtaking sunset from there. The traditional dance performance at the temple was mesmerizing too.

Now, I'm eager to hear about your last holiday! Where did you go, and what did you do there? I'm sure you had an amazing time as well. Let's catch up soon and share our travel stories.

Take care and talk to you soon!

Warm regards,
[Your Name]

Hey Tommy,

Hope you're doing well! I just wanted to drop you a quick email to tell you about the amazing time I'm having on my holiday in this charming seaside town. 

I chose this town for my holiday because of its picturesque beaches and serene atmosphere. It's the perfect place to unwind and relax away from the hustle and bustle of the city. 

One of the things I've enjoyed the most is taking long walks along the beach at sunset. The views are absolutely breathtaking, and it's so peaceful and calming. 

When I return, we should definitely plan to meet up. I can't wait to share more about my adventures and hear about what's been going on with you. Let's catch up soon!

Take care,
[Your Name]

A. 

1. advancement (n)
2. popularity (n)
3. invasion (n)
4. correspondence (n)
5. attraction (n)
6. dependence (n)
7. security (n)
8. information (n)
9. misuse (v)
10. cooperation (n)

B. 
1. D. took
2. C. went out
3. A. marked
4. C. entire
5. A. put
6. C. role
7. A. underestimate
8. C. achieve

1. C. I agree with you.
2. D. enhance the quality of life.
3. A. Although.
4. D. could stay.
5. D. turning off.
8. D. on.
9. A. famous

6. A. that
7. D.in
10. D. How can I help you?
Do đề sắp xếp không theo thứ tự

29. appearance.
30. written.
31. scientists.
32. attractions.
33. occurred.
34. satisfactorily.

\(P=\dfrac{\sqrt x-5}{\sqrt x -3}=\dfrac{\sqrt x-3-2}{\sqrt x -3}=1-\dfrac{2}{\sqrt x -3}\)

Để \(P \in Z \Leftrightarrow 2\vdots \sqrt x -3 \Rightarrow \sqrt x -3 \in \text{Ư(2)={1;-1;2;-2}}\)

\(\Rightarrow \sqrt x \in \text{{4;2;5;1}} \Rightarrow x \in \text{{16;4;25;1}}\)

\(\Rightarrow x_{max}=25\)

\(A+1=\dfrac{2m}{m^2+1}+1=\dfrac{m^2+2m+1}{m^2+1}=\dfrac{(m+1)^2}{m^2+1} \ge0\)

\(\Rightarrow A\ge-1\)

Dấu '=' xảy ra \(\Leftrightarrow m+1=0\Leftrightarrow m=-1\)

Vậy \(A_{min}=-1 \Leftrightarrow m=-1\)

em cám ơn ạ