cho hàm số y= \(\left(3-2\sqrt{2}\right)x+\sqrt{2}-1\)

a) Hàm số trên đồng hay nghịch biến? Vì sao?

b) Tìm giá trị x để y=0

c) tìm giá trị của y khi x= 3+\(2\sqrt{2}\)

cho từ từ dung dịch HCl vào dung dịch Na2CO3 và ngược lại

nêu hiện tượng và pt

1. I am so shy .

If only ........................................................................................................................

2. I didn't know how to say to her yesterday .

I wish .................................................................................

3. It rained heavily .

We wish ..................................................................................................................

4. She is not visiting me tonight .

I 'd rather ..............................................................................................

5. Life is so complicated .

He wishes .........................................................................................................

6. They can't drive a car .

If only ..............................................................................................................

7. There weren't any tickets for us to buy.

We'd rather .............................................................................

8. What a pity . Shops here will shut tommorow .

She wishes ...................................................................

9. Our garden didn't get any sun .

We 'd rather ...........................................................................................

10 . He always go to bed so late .

If only ..................................................................................................

11. She wasn't at my party last week .

Iwish ............................................................................................

12. I didn't know where you were yesterday .

I wish ................................................................................

1. The students wish they ( can leave ).................... for Hanoi with the team .

2. I wish I ( not miss ) ........................ the cartoon on TV last night .

3. She wishes she ( go) .................. on a camping with her friend next Sun day .

4. If only Ba and An ( Join ) ............... in the sightseeing tour last week .

5. I would rather their team ( play ) ..................well yesterday .

6. She wishes her mother ( buy ) .................... her new clothes for Tet now .

7. If only I ( have ) ................... a chance to meet that famous singer tonight .

8. I woud rather they ( understand ) .................... how to begin the games on the computer this morning

tìm GTNN ( Áp dụng BĐT cơ bản hoặc BĐT cổ điển )

\(5x+3y+\dfrac{12}{x}+\dfrac{16}{y}\) biết x>0 ; y>0 và x+y ≥6