=-122 tích tớ nhé

lần thứ hai là 24

lần thứ nhất là 15

bn điền lần bán 2 vào ô từ bên trái qua

còn lần bán 1 là từ bên phải qua 

Bài 2:

\(a,G=\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{1}{1-\sqrt{x}}-\dfrac{2\sqrt{x}}{x-1}\right)\left(\sqrt{x}+1\right)\\ =\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}+\dfrac{1}{\sqrt{x}-1}-\dfrac{2\sqrt{x}}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}\right)\left(\sqrt{x}+1\right)\\ =\left(\dfrac{\sqrt{x}\left(\sqrt{x}-1\right)+\sqrt{x}+1-2\sqrt{x}}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}\right)\left(\sqrt{x}+1\right)\\ =\dfrac{x-2\sqrt{x}+1}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}.\left(\sqrt{x}+1\right)\\ =\dfrac{\left(\sqrt{x}-1\right)^2}{\sqrt{x}-1}\\ =\sqrt{x}-1\)

có đáp án rồi làm làm gì nữa

BC(18;30;45)={90;180;270;....}

tick nhé

Write the correct form of the world in the bank:

1, This room is very small. It is inconvenient for a large family. (convenient)

2, She feels unhappy because she gets bad mark. (Happy)

3, We are preparing a meal for Minh's birthday party at the moment. ( prepare)

4, The Earth moves around the Sun. (move)

II. Supply the correct form of the word in brackets:

1. Hoa and Nien used to be next-door neighbors. (neighborhood)

2. Surface mail is much cheaper than airmail . (cheap)

3. The shoes were nice, but they were uncomfortable. (comfort)

4. A new shopping mall is opening in this district today. (shop)

5. The stores offer a wider selection of products. (select)

6. He thinks the pancakes are tasty. (taste)

7. They are looking at the advertisement of " What's on this week ? " (advertise)

8. This man is a store owner. (own)

9. The residents are going to hold a community meeting (reside)

10. We can't see him now; it's inconvenient (convenience)

III. Complete the sentences with " for / since ":

1. She's been in Ha Noi since June.

2. He's lived in HCM for ten years.

3. They haven't seen each other for a long time.

4. She has read this novel for two hours.

5. We've played football since two o'clock.

6. I have known her for a few years.

7. My father has worded for that company since 1990.

8. They have been at my house since 8 o'clock this morning.

9. We have been waiting for an hour.

10. They have studied since seven o'clock.

IV. Read the situations and complete the sentences, using the words in brackets

1. She speaks English very well, and her sister speaks well, too. ( as…as )

=>She speaks English as well as her sister.

2. My birthday is 12 August. Tom's birthday is 12 August. (the same as)

=> My birthday is the same as Tom's birthday.

4119

tik mik nha mik tik lại

I. Choose the word or phrase that best completes the sentences :

1. Do you want toto send this letter airmail or …………… ?

A. normal mail

B. ordinary mail

C. surface mail

D. usual mail

2. When he was young, he ……………………that primary school.

A. arrived

B. attend

C. collected

D. destroyed

3. The area is hot and………… in summer.

A. cold

B. cool

C. warm

D. humid

4. The residents in my …………are not happy about the changes.

A. neighbor

B. neighborhood

C. neighborly

D. neighbouring

5. From this bridge, you can see the………………………of my house.

A. foot

B. floor

C. roof

D. stairs

6. This famous restaurant …………………food from every part of the world.

A. serves

B. cooks

C. boils

D. stews

7. He gave the …………………… answers as I did

A. different

B. same

C. far

D. convenient

8. The pocket-watch is vey ……………………from the wristwatch.

A. same

B. similar

C. different

D. difficult

9. Airmail is …………………… expensive than surface mail.

A. more

B. like

C. as

D. the most

10. What have you done ………............…you said goodbye to us ?

A. for

B. since

C. when

D. before

11. Martina's mother has been her coach ………………… many years.

A. since

B. for

C. as

D. when

12. These boxes are……………...

A. too heavy for carrying

B. too heavy to carrying

C. too heavy can't carry

D. heavier to carry

13. She arrived early ………….. get a good seat.

A. for

B. since

C. in order to

D. so that

14. The President is deeply concerned …………………… this issues.

A. about

B. to

C. in

D. on

15. They ………………… in this factory simce last year.

A. work

B. are working

C. has worked

D. have worked

16. When I was young, I ……………… collecting stamps.

A. like

B. liked

C. have liked

D. will like

17. My Dad told me…………… hard.

A. to learn

B. learn

C. learnt

D. learning

18. I……………………her for some months.

A. knew

B. know

C. have known

D. known

19. They……………………to Ho Chi Minh City in 2000.

A. moved

B. move

C. have moved

D. were moving

20. I………………………to bed at 11 o'clock last night.

A. have gone

B. went

C. go

D. will go

21. She………………………a motorbike two years ago.

A. buys

B. will buy

C. has bought

D. bought

22. We…………………her since last week

A. don't see

B. saw

C. haven't seen

D. will see

23. He……………………this bicycle for a long time.

A. had

B. has had

C. has

D. will have

24. There………………5,400,000 scouts in American in 1994.

A. are

B. were

C. will be

D. was

25. He……………………sick for a few days.

A. has been

B. was

C. is

D. will be

hihi de qua rui 800 nha ban