Cho hàm số  xác định trên và có bảng biến thiên như hình vẽ.   Số nghiệm của phương trình là.  

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions:

  The World Health Organisation was established on April 7th 1948.         

• Các nhân tố tiến hoá làm phong phú vốn gen của quần thể là:   

• Yếu tố ngẫu nhiên:       

• Choose the sentence that is closest in meaning to the given one:

  My mother had the house decorated.          

• Choose the sentence that is closest in meaning to the given one:

  Nobody at all came to the meeting.           

• Mark the letter A, B, C or D to indicate the word/phrases SIMILAR in meaning to the underlined word(s) in each of the following questions:

  He devised a computer game and sold it to Atari.

• Mark the letter A, B, C or D to indicate the word/phrases SIMILAR in meaning to the underlined word(s) in each of the following questions:

  The change in population distribution was barely noticeable to the demographers conducting the study.         

• Mark the letter A, B, C or D to indicate the word/phrases SIMILAR in meaning to the underlined word(s) in each of the following questions:

  Mobile libraries bring books to children in many small communities. These libraries travel from towns to towns in cars, vans, or trucks.         

• Mark the letter A, B, C or D to indicate the word/phrases SIMILAR in meaning to the underlined word(s) in each of the following questions:

  People in Korea gave books to schools in Indonesia, and Indonesians taught Koreans a traditional dance. This exchange helped them learn about each other’s culture.         

• Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions:

  A nuclear power plant emits less radiation than a granite structure of similar proportion, such as the Lincoln Memorial. “Emits” means ________.