Trong không gian với hệ tọa độ Oxyz, cho hai điểm $A\left(1;0;-2\right),B\left(2;1;-1\right).$ Tìm tọa độ trọng tâm G của tam giác OAB.

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:

  theater                     appeal                    heat                     leading

• Choose the word that has the underlined part pronounced differently from the rest:

  character                     technical                     children                    chemist

• Choose the word that has the underlined part pronounced differently from the rest:

  oppose                     suppose                      purpose                     propose

• Choose the best answer for the following sentence:

  I think love movies are not good _________ children.
   

• Choose the best answer for the following sentence:

  She was amazed ___________ how calm she felt after the accident.
  
  

• Choose the best answer for the following sentence:

  The actor was violently opposed ___________ the director’s idea of not choos-ing him the leading character.
   

• Choose the best answer for the following sentence:

  I like movies _____________ plays.
   

• Choose the best answer for the following sentence:

  I would rather see a love movie __________ an action film.
   

• Choose the best answer for the following sentence:

  She has a very big house in __________ Salt Lake City is __________ capital of Utah.
   

• Choose the best answer for the following sentence:

  Film is _________ term that encompasses individual motion pictures, the field of film as ___________ art form, and the motion picture industry.