Gọi  là đường thẳng đi qua  có hệ số góc  cắt đồ thị  tại ba điểm phân biệt , , . Gọi ,  lần lượt là hình chiếu vuông góc của ,  lên trục tung. Tìm giá trị dương của  để hình thang  có diện tích bằng 8.         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  spend                  send                      lend                   become

• Choose the best answer for the following sentence:

  Look! Someone ___________ the coffee on the keyboard.
  
  

• Choose a word that has different stress pattern:

  experience                 favourite                  subject                  primary

• Choose the best answer for the following sentence:

  Nghia: “Where _____________ born?”

  Ngoc: “In Kim Lien, Nam Dan”
  
  

• Choose a word that has different stress pattern:

  interview                   background                      scientific                      secondary

• Choose the best answer for the following sentence:

  He failed the exam to university last year. Since then he ______________ very hard
  the next entrance examination.
   

• Choose a word that has different stress pattern:

  education                 romantic                      conversation                      information

• Choose the best answer for the following sentence:

  I sent email to my pen pal three weeks ago but she ___________ so far.
  
  

• Choose a word that has different stress pattern:

  basketball                 diploma                 champion                  evidence

• Choose the best answer for the following sentence:

  Albert Einstein was the scientist who _____________ the theory of relativity.