Với a, b là các số thực dương, cho các biểu thức sau:

1-                                   2-

3-          4-

Số biểu thức đúng là:  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Happiness finally came to the patient couple after many _______________ years.
  
  

• Choose the best answer for the following sentence:

  I think the quickest way for you to lose weight is to ______________ animal fats from your diet.
  

• Choose the best answer for the following sentence:

  She is in no mood of eating for the whole day after the ___________ breakfast.
   

• Choose the best answer for the following sentence:

  The candidate was successful because everybody believed in his promise of free _____________ for them.
   

• Choose the best answer for the following sentence:

  Putting a man on the moon was one of our greatest _____________ that will be mentioned in history again and again.
   

• Choose the best answer for the following sentence:

  He _____________ legal proceedings against the newspaper which approved of corporal punishment at school.
   

• Choose the best answer for the following sentence:

  We are running out of natural resources due to the ______________ way of using it for a long time.
   

• Choose the best answer for the following sentence:

  ______________ is a chemical used to kill insects that damage crops.
   

• Choose the best answer for the following sentence:

  The Prime Minister _____________ the people many times about the bad effects of drug.

• Choose the best answer for the following sentence:

  Parents try to do their best for their children ___________ the fact that the children sometimes misunderstand their caring.