\(x\times\dfrac{20}{11}=\dfrac{1}{1}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{9}+\dfrac{1}{9}-\dfrac{1}{11}\\ x\times\dfrac{20}{11}=\dfrac{10}{11}\\ \Rightarrow x=\dfrac{1}{2}\)

Ta có :

=> X x 20/11 = ( 1 - 1/3 ) + ( 1/3 - 1/5 ) + ( 1/5 - 1/7 ) + ( 1/7 - 1/9 ) + ( 1/9 + 1/ 11 )

=> X x 2/11 = 1 - 1/11 = X x 1/11 = 11/11 - 1/11

=> X x 20/11 = 10/11

=> X = 10/11 : 20/11

=> X = 1/2

\(Xx\dfrac{20}{11}=\dfrac{2}{1}-\dfrac{2}{3}+\dfrac{2}{3}-\dfrac{2}{5}+\dfrac{2}{5}-\dfrac{2}{7}+\dfrac{2}{7}-\dfrac{2}{9}+\dfrac{2}{9}-\dfrac{2}{11}\)

\(Xx\dfrac{20}{11}=\dfrac{2}{1}-\dfrac{2}{11}\)

\(Xx\dfrac{20}{11}=\dfrac{20}{11}\)

\(X=\dfrac{20}{11}:\dfrac{20}{11}\)

\(X=1\)

vậy X = 1

tưởng bảo không vào nữa

1- “Hello. You must be Maryam”. – “_______”

A. I am         B. That's right, I am.      C. All right.            D. Yes, of course

2- “Let me introduce myself. I’m Nga”. - “____________”

A. Thank you, Nga   B. That’s great  C. Pleased to meet you, Nga  D. Thanks

3- “Thank you very much” . - “____________”

A. Sure        B. You are welcome      C. Nothing               D. I’m glad

4- “What about collecting the garbage every day?. - “____________”

A. That's a good idea!   B. very good         C. That's good         D. Yes, of course

5- I’m sorry that I broke your bike” - “____________”

A. OK        B. Not bad           C. You’re welcome         D. Don't worry. I can fix it.

6- “I think we should take a shower instead of a bath to save energy” - “________”

A. Not at all      B. Very well         C. That's fine           D. It's a good idea

7- “How about turning off the lights when leaving home? - “____________”

A. Great             B. Great! Let's do that      C. No problem       D. Yes, of course

8- “Shall we go for a walk?” - “____________”

A. No, I don't      B. I don't like        C. No. I don't want to       D. No. Thank you

9- “Let me congratulate you on your nomination” - “____________”

A. You are welcome                                          C. That's fine 

B. Don't worry                                                  D. That's very kind of you

10- “You’ve passed your exam, Nga. Well done.” - “____________”

A. Thanks             B. No problem         C. Not at all            D. Nothing

11- “Lan, You’ve won the first prize. Congratulations!” - “____________”

A. It's nice        B. No problem            C. It's nice of you to say so     D. Welcome

12- “I think we should buy some canned food before a storm” - “___________”

A. You’re welcome                                           C. I'm fine

B. I agree with you                                           D. That's correct

13- “Miss Lien, I’d like you to meet my mother” - “____________”

A. It's a pleasure to meet you, Mrs Lan           B- It's good to meet you, Mrs Lan

C- It's very well to meet you, Mrs Lan             D- It's very kind of you, Mrs Lan

14- “Please tell her to meet me at my house” - “____________”

A. No problem                                                  C. It’s a good idea

B. You’re  welcome                                          D. That's right

15- “Thanks for your help” - “____________”

A. Don't worry        B- Yes, Please                C. My pleasure        D. Thank you

16- “Sorry, I can’t come. Thanks anyway” - “____________”

A. Not at all            B. Thanks                    C. That's good          D. Not bad

17- “May I see the report?” - “____________”

A. Sure. Here you are         B. Not at all          C. Nothing          D. Thank you

18- “Could you help me, please” - “____________”

A. I’m sorry           B. Certainly                 C. Yes, that’s ok         D. Not at all

19- “Could you do me a favor?” - “____________”

A. I will             B. What’s that        C. What can I do for you     D. What?

20- “Do you need any help?” - “____________”

A. No. Thank you. I’m fine                                      C. Yes, that’s right  

B. No. I’m fine                                                         D. No, I don’t

1- “Hello. You must be Maryam”. – “_______”

A. I am         B. That's right, I am.      C. All right.            D. Yes, of course

2- “Let me introduce myself. I’m Nga”. - “____________”

A. Thank you, Nga   B. That’s great  C. Pleased to meet you, Nga  D. Thanks

3- “Thank you very much” . - “____________”

A. Sure        B. You are welcome      C. Nothing               D. I’m glad

4- “What about collecting the garbage every day?. - “____________”

A. That's a good idea!   B. very good         C. That's good         D. Yes, of course

5- I’m sorry that I broke your bike” - “____________”

A. OK        B. Not bad           C. You’re welcome         D. Don't worry. I can fix it.

6- “I think we should take a shower instead of a bath to save energy” - “________”

A. Not at all      B. Very well         C. That's fine           D. It's a good idea

7- “How about turning off the lights when leaving home? - “____________”

A. Great             B. Great! Let's do that      C. No problem       D. Yes, of course

8- “Shall we go for a walk?” - “____________”

A. No, I don't      B. I don't like        C. No. I don't want to       D. No. Thank you

9- “Let me congratulate you on your nomination” - “____________”

A. You are welcome                                          C. That's fine 

B. Don't worry                                                  D. That's very kind of you

10- “You’ve passed your exam, Nga. Well done.” - “____________”

A. Thanks             B. No problem         C. Not at all            D. Nothing

11- “Lan, You’ve won the first prize. Congratulations!” - “____________”

A. It's nice        B. No problem            C. It's nice of you to say so     D. Welcome

12- “I think we should buy some canned food before a storm” - “___________”

A. You’re welcome                                           C. I'm fine

B. I agree with you                                           D. That's correct

13- “Miss Lien, I’d like you to meet my mother” - “____________”

A. It's a pleasure to meet you, Mrs Lan           B- It's good to meet you, Mrs Lan

C- It's very well to meet you, Mrs Lan             D- It's very kind of you, Mrs Lan

14- “Please tell her to meet me at my house” - “____________”

A. No problem                                                  C. It’s a good idea

B. You’re  welcome                                          D. That's right

15- “Thanks for your help” - “____________”

A. Don't worry        B- Yes, Please                C. My pleasure        D. Thank you

16- “Sorry, I can’t come. Thanks anyway” - “____________”

A. Not at all            B. Thanks                    C. That's good          D. Not bad

17- “May I see the report?” - “____________”

A. Sure. Here you are         B. Not at all          C. Nothing          D. Thank you

18- “Could you help me, please” - “____________”

A. I’m sorry           B. Certainly                 C. Yes, that’s ok         D. Not at all

19- “Could you do me a favor?” - “____________”

A. I will             B. What’s that        C. What can I do for you     D. What?

20- “Do you need any help?” - “____________”

A. No. Thank you. I’m fine                                      C. Yes, that’s right  

B. No. I’m fine                                                         D. No, I don’t

1.B. That's right, I am.

2.C. Pleased to meet you, Nga

3.B. You are welcome

4.A. That's a good idea! 

5.D. Don't worry. I can fix it.

6.D. It's a good idea

7.B. Great! Let's do that

8.  C. No. I don't want to

9.D. That's very kind of you

10.A. Thanks  

11.C. It's nice of you to say so 

12.B. I agree with you 

13.A. It's a pleasure to meet you, Mrs Lan 

14.  C. It’s a good idea

15.  C. My pleasure 

16.A. Not at all   

17.A. Sure. Here you are 

18.B. Certainly  

19.C. What can I do for you 

20.A. No. Thank you. I’m fine   

 

1 They accused Tom of stealing his money

2 She thanked me for my help

3 She apologized for not being able to help me

Everyone has a person to love. And so do I. To me, that person is my mother. This year, she is nearly 40 years old. My mom is very tall. She has a round face, brown eyes and short hair. To my ways of thinking, she is the most beautiful woman in the world. My mom cooks very well and very hard-working. She plays badminton well, too. In her free time, she often teaches me maths or surfing the Internet. My mom loves me very much. She can sacrifice everything for me. When I have problems, I always confide to my mom. She encourages and consoles me when I sad or when I got bad marks.. She gives me a present and very happy when I do good work. There is an unforgetable memory that makes me love my mom much more. That night, I had an illness and I felt so sick that I counldn't even stand. My mom spent a sleepless night to take care of me carefully. She helped me took medicine and fed me gruel. After a night, I felt much more better but my mom was very tired and sleepy. I love my mother very much. I'll try my best to make her happy and always have a smile on her lips.

Tham khảo :

My mother is a person I admire most. She devoted a lot of time and energy to the upbringing of my two brothers and I. Despite working hard, she always made time to teach us many useful things which are necessary and important in our later lives. Moreover, she is a good role model for me to follow. She always tries to get on well with people who live next door and help everyone when they are in difficulties, so most of them respect and love her. I admire and look up to my mother because she not only brings me up well but also stands by me and gives some help if necessary. For example, when I encounter some difficulties, she will give me some precious advice to help me solve those problems. She has a major influence on me and I hope that I will inherit some of her traits.

Bài dịch:
Mẹ tôi là người mà tôi ngưỡng mộ nhất. Mẹ đã cống hiến nhiều thời gian và sức lực vào việc dạy dỗ tôi và hai anh trai tôi. Mặc dù làm việc vất vả nhưng bà ấy đã luôn dành thời gian để dạy chúng tôi nhiều điều bổ ích mà cần thiết và quan trọng trong cuộc sống sau này của chúng tôi. Hơn nữa, mẹ là một tấm gương cho tôi noi theo. Mẹ luôn cố gắng sống hòa thuận với những người hàng xóm bên cạnh và giúp đỡ mọi người khi họ gặp khó khăn cho nên hầu hết mọi người tôn trọng và yêu quý bà ấy. Tôi ngưỡng mộ và kính trọng mẹ tôi không chỉ bởi vì bà nuôi dưỡng tôi tốt mà mẹ còn bên tôi và đưa ra sự giúp đỡ nếu cần thiết. Ví dụ như khi tôi gặp những khó khăn thì mẹ sẽ đưa ra những lời khuyên quý giá giúp tôi giải quyết những vấn đề đó. Mẹ có ảnh hưởng lớn tới tôi và tôi hi vọng rằng tôi sẽ thừa hưởng được một số nét tính cách của mẹ.

Dễ mà>

A