1.Cho a,b,c là các số thực dương thõa mãn: a^2 + 2b^2 <= 3c^2

CMR:1/a +2/b >= 3/c

2.Cho các số thực dương x,y,z thõa mãn:xyz=1

Tìm GTLN của biểu thức Q= 1/x+y+1 + 1/y+z+1 +1/z+x+1

Mn giúp mk nha

I.Match the phrase verb with ít meaning.

Phrase verb / Meaning

1. Pass sth down a. to start to suffer from an illness, especially one that is not serious

2. Come down on sb/sth b. if a machine or vehicle breaks down, it stops working

3. Set up c. to teach or give something to someone who will be alive after you have died

4. Give up d. to look after someone or something

5. Take care of e. to trust someone or something and know that they will help you or do what you want or expect them to do

6.Come down with f. to punish or criticize a person or activity very strongly

7. Depend on g. to stop doing something before you have finished it

8. Break down h. to establish someone or yourself in a business or position

II.Say whether the sentence is a dependent clause of concession(DC), of purpose(DP), of reason(DR), of tim(DT), of cause(DCa), of place(DPla), or of result(DRe)

1. ____ Sincewe have no money, we can't buy it

2. ____ I will go where tell me

3. ____ When it rains, I usualy go to school by bus

4. ____ He sold the car because it was too small

5. ____ The coffee is so hot hat I cannot drink it

6. ____ She dresses in red so hat everyone pays attention to her

7. ____ Some people eat so that they may live. Others seem to live in order that they may eat

III. Put a single underline under the unstressed words and double underlines under the stressed words in under the following sentences

1. Where can I take the bus?

2. When my father was small, he didn't like collecting stamps

3. I am clumsy but my brother is very skillful

4. Are there any bookstores in your village?

5. My classmates enjoy going to the park when they are free

6. The rich like spending money on antique product

7. My mother is a skillful artisan

8. What are the most interesting products of this village?

9. My father is learning to carve eggshells

10. Hand-made products are usually nice but expensive

Mn ơi, cứu mk vs ><

Mk đag cố gắng hok để vào lớp 10

Xin mn trợ giúp mk nha ^<3^

Rewrite the sentences, using the given words that have the same meaning with underlined words:

Turn down set up close down turn up

live on keep up with get up

1. When did your father _start_ this shop?

2. What time do you _get out of bed_ every day?

3. You should study harder to _stay equal with_ your classmate

4.If Tom didn't _arrive_ , we would go without him

5. The orphan _earned money from selling lottery to live

6.I invited her to my house for dinner but she _refused_

7.Why did you _stop doing business with_ your workshop?

Mn ưi, giúp mk vs ><"

Mơn trc nha ^^ <3