Cho khối chóp S.ABCD có thể tích bằng 1 và đáy ABCD là hình bình hành. Trên cạnh SC lấy điểm E sao cho SE = 2EC. Tính thể tích V của khối tứ diện SEBD.        

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Where's your father?

  He _________ in his office.
  
  

• Choose the best answer for the following sentence:

  I'm afraid my parents do not allow me ___________ on a long journey.
    

• Choose the best answer for the following sentence:

  Tell me about your plan, Lan. What ____________ this Saturday evening?
  
  

• Choose the correct sentence which is built from the words and phrases given:

  The film / very controversial / ending / marriage / love/ Rhett Butler / Scarlet O'Hara//.
  
  

• Choose the best answer for the following sentence:

  Have you found anywhere suitable ___________ our picnic?
   

• Choose the best answer for the following sentence:

  I ____________ when I heard my name _____________
  
  

• Choose the best answer for the following sentence:

  The movie ___________ last night was terrific.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Don’t try that kind of food. I’m sure you will like it.

• Choose the best answer for the following sentence:

  When there __________ a full moon, the ocean tides will be higher.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  The World Cup is regarded as the world champion of the sport.