1) rút gọn: A= \(\left(\dfrac{\sqrt{a}+1}{\sqrt{a}-1}-\dfrac{\sqrt{a}+1}{\sqrt{a}+1}+4\sqrt{a}\right).\dfrac{1}{2a\sqrt{a}}\) vs a>0, a≠1

2) cho hàm số \(y=\left(k-2\right)x+k^2-2k\). xác định k để đthị hàm số bậc nhất cắt trục hoành tại điểm có hoành độ =2

giúp mk vs ak mk cần gấp

giúp mk vs ah mk cần gấp

1A

2C

3B

4A

I. Put the verbs in brackets into the correct tenses of the conditionals.

1. If you (not go) away I’ll send for the police.

2. I’ll be very angry if he (make) any more mistakes.

3. If he (be) late we’ll go without him.

4. She will be absolutely furious if she (hear) about this.

5. If you put on the kettle I (make) the tea.

6. If you give my dog a bone he (bury) it at once.

7. If we leave the car here it (not be) in anybody’s way.

8. He’ll be late for the train if he (not start) at once.

9. If you come late they (not let) you in.

10. If he (go) on telling lies nobody will believe a word he says.

giúp mk vs ạ mk cần gấp

passive voice

1.They grow rice in tropical countries.

2.She has finished the report.

3. They are preparing my piano at the moment

4.We haven’t seen Peter yet.

5.You should insure the package.

6.The teacher will correct our exercises tomorrow.

7. The manager didn’t phone the secretary this morning.

8. They will announce the news tomorrow.

9. She is going to help Nam tomorrow.

10.She couldn’t catch his name.

giúp mk vs ạ mk cần gấp