Tìm GTNN $\left(x^2-4x+y^2-8y+6\right)$

- Fancy:  “____” - Sue: "Great. Thanks."

A. Be careful!

B. Excuse me!

C. How are you doing?

D. What are you doing?

- Customer:  ”I'd like  to place an order for  delivery, please.” - Receptionist: “ ____ ”

A. Sure,  what  would you like?

B. Sure, how much is it ?

C. No, we actually  take orders  at five.                                                

- Liz: “Thanks for the nice gift you brought to us!”  - jennifer: “ ___ ”

A. All right. Do you know how much it costs?

B. Actually speaking. I myself don’t like it.

C. Not at all. Don't mention it.

“Can you give me a  hand on this?” - “____"

A. I have only two hands.

B. No, My hands are busy now.

C. Oh, sorry, I’m busy at the moment.

Thomas and Peter are meeting after a long time.

- Thomas: “How have you been recently?” - Peter: “____"

A. I am going on holiday next week.

B. Pretty busy, I think.

C. By car, usually.

D. I am working here.

George and Frankie are talking about their hobbies.

- George: “In  my opinion, action  films are exciting”  - Frankie: “____"

A. What are opinion!

B. There's no doubt about it.

C. Yes, you can do it.

"____” - “ Oh, That sounds interesting”

A. How  are the cakes?

B. What cakes do you like?

C. Would you like some cakes?

D. What do you think about the cakes?

- “I didn’t see you  when I came  back  here yesterday.” - “ ____ ”

A. Thank you. I’ll finish all my work today.

B. I’m sorry, but I didn’t see you here, either.

C. I’m very sorry. My son had an accident yesterday afternoon.

D. Forget about it. It's not my fault.

- “I wonder if  you could  help me?” - “  ”

A. No, what is it? I'll be able to manage it.

B. Really? How nice.

C. Don’t mention it. I’m very pleased to help you.

D. I'll do my best. What's the problem?

Minh and Lan are talking about Minh’s boyfriend

- Minh: “If only I hadn't lent him all my money!” - Lan: “____”

A. Well, it’s no use crying over spilt milk.

B. I’m afraid. That’s what you did.

C. All right. You’ll be OK soon.

Cindy wanted to drive her best friend to have dinner at an Italian restaurant but her car couldn't start. Therefore, she had to borrow one from Nancy.

- Cindy: "Would you mind lending me your car?" - fancy: "____"                               

A. Great

B. Yes. Here lt is

C. Yes, let's

D. No, not at all.

A woman needs to make an urgent call; she is asking the man for permission to use his phone.

- Woman: “Could I use your phone, please? I need to make an urgent call.”

- Man: “____”

A. I’d rather not                  B. Are you kidding?           

 Two students, Bill and Bob, are talking about their teacher, Ms Young.

- Bill: “Ms Young always grades fairly.”  - Bob: “ ____ ”

A. I can’t say  that it does

B. Actually, she is the second best.

C. Really? How could that be?

  Peter is in a restaurant.

- Waiter: “Are you ready to order?” - Peter “____”

A. Yes, I'm ready. What's the order?

B. Yes, I like giving orders to other people

C. Yes, I'd like to start with the salad, please.

 Tom is talking to Daisy about her trip to Vietnam.

- Tom: "Hey  Daisy. How was your  trip to Vietnam?"  - Daisy: “ ____ ”

A. I went there on my own.

B. Oh, great. I had a nlce time.

C. I slept all the tlme on the plane.

 Barbara is at the clinic.

- Barbara:  “Can I make an appointment  to see a doctor,  please?”  - Receptionist: “____”

A. Not at the moment. He can’t be disturbed.

B. OK, let me just check my diary.

C. Have a seat and I will be with you in an hour.

1. Two friends Cindy and Peter are talking about Peter's tennis game.

- Cindy: “I thought your tennls game was a lot better today, Peter.”

- Peter: “____. I thought it was terrible.”

A. It’s alright

C. My pleasure

B. Never mind

- Mai: “Our living standards have been improved greatly”- Susan: “____"

A. Thank  you  for saying so.

B. Sure. I couldn’t agree more.

C. No, it's nice to say so.

John was in Hanoi and wanted to send a parcel to his parents. He asked  a local  passer-by  the way to  the post-office.

- John:  “Can you show me the way to the nearest post office, please?”

- Passer-by: “_____”

A. Not way, sorry.

B. Just round the corner over there.

C. Look it up in a dictionary!                                                

D. There’s no traffic near here.

- “Why did Jesse leave the  party so early?”  - “ ____ ”

A. You don't say.

B. Why not?

C. Beats me.                                                

- “Let's take the tent.”  - “ ____ ”

A. Don't!

C. How about paying by cash?

B. Of course, not!

 Mrs Smith and her students are visiting the zoo.

- Mike: "Can I feed the gorilla, Mrs Smith?"

- Mrs Smith: ”____ The sign says 'No feeding the animals'."

A. Of course you can

C. I'm sure about that

B. I don't think it works

  Mary and John are meeting at the cinema.

- Mary: ”Hi, John. How are you?” - John: ”____. And you?”

A. Fine, thanks

B. I'm thirty-five years old

C. I'm free today                                                

David and his teacher are meeting at the school gate.

- David: "Good morning, Mr Deakin. How are you?" - Mr Deakin: "____. And you?"

A. I'm busy now

B. I'm fine. Thank you

C. I'm going home                                                

  Linda is thanking Daniel for his birthday present.

- Linda: "Thanks  for the book. I've been  looking for it for months." Daniel: "____"

A. You can say  that again

B. Thank you for looking for lt

C. I like reading books                                                

D. I'm glad you like it

  Jenny and her teacher are meeting at the bus stop.

- Jenny: ”Good  afternoon,  Miss. How are you?” - Teacher: ” ____. And you?”

A. I'm golng home      

B. I'm leaving now            

C. I'm thirty years old      

   Liz is telling Andrew about her first novel.

- Liz: "Guess what? My first novel has just been published." - Andrew: "____"

A. It's my pleasure.

B. Congratulations!

C. Better luck next time!                                                

D. It's very kind of you.

Two close friends Tom and Kyle are talking about Kyle’s upcoming birthday. Select the most suitable response to complete the exchange.

- Tom:  “Can I bring a friend  to your birthday  party?”  - Kyle: “____”

A. It’s my honour.      

B. Let’s do it then.                

C. The more the merrier.

A waiter in a restaurant is talking to a customer who has just finished his meal there. Select the most suitable response to complete the exchange.

- Waiter: “Here’s your bill, sir.” - Customer: “____”

A. Don't mention it.                                            

B. Can I pay by credit card?

C. What  do you have?                                                

Ken and Tom are high-school students. They are discussing where their study group will meet. Select the most suitable response to fill in the blank.

- Ken: “Where is our study  group going to meet next  weekend?” - Tom: “___"

A. We are too busy on weekdays.

B. The library would be best.

C. Why don’t you look at the atlas?                                                

 Mike and Lane are university students. They are talking about Lane’s upcoming high-school reunion. Select the most suitable response to fill in the blank.

- Mike:  “So,  you have your  fifth high-school  reunion coming  up?” - Lane: “____”

A. Oh, the school reunion was wonderful.

B. The food at the reunion was excellent.

C. Yeah. I’m really looking  forward to it.        

Mike and Lane are university students. They are talking about Lane’s upcoming high-school reunion. Select the most suitable response to fill in the blank.

- Mike:  “So,  you have your  fifth high-school  reunion coming  up?” - Lane: “____”

A. Oh, the school reunion was wonderful.

B. The food at the reunion was excellent.

C. Yeah. I’m really looking  forward to it.        

Minh, a student from Hai Phong, is going to take the college entrance exam in Hanoi next week. His father is seeing him off at the railway station. Select the most suitable response to fill in the blank.

- Dad: “Good  luck with the exam, Minh!”  - Minh: “____ , Dad.”

A. By no means          

B. Thank you                          

C. I wish so                            

Jane had difficulty carrying her suitcase upstairs, and Mike, her friend, offered to help. Select the most suitable response to fill in the blank.

- Mike: “Need  a hand  with your suitcase, Jane?” - Jane: “____”

A. Not a chance.

B. That’s very kind of you.

C. Well done!                                                

D. I don’t believe it.

So sánh: 200920 và 2009200910

$$\begin{gathered} 1) y=\frac{\tan 4x}{\cos 4x+\sin 3x} \\ 2) y=\sqrt{\frac{2+\sin x}{{\tan }^{2}x}} \end{gathered}$$
Mọi người giúp em với ạ, em xin cảm ơn!

Có bao nhiêu giá trị thực của tham số m để hàm số y=|$x^2$+mx+1| trên [-1;2] đạt giá trị nhỏ nhất bằng 1?

Cho tam giác ABC có AB=3cm,AC=4,5cm,BC=6cm.tam giác DEF có DE=12cm,EF=9cm,DF=6cm.

C/minh ABC đồng dạng FDE.