Phương trình  có một nghiệm dạng  với , là các số nguyên dương thuộc khoảng  . Khi đó  bằng        

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:

  transformed                moved              earned               invented

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

  about                   plough                 cough                    shout

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

  waste                taste            station               statue

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

  bury             carry             heavy                many

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

  thank             them              thick                thoughtful

• Choose one sentence that has the same meaning as the root one:

  My uncle used to be a high school teacher.
  
  

• Choose one sentence that has the same meaning as the root one:

  The film was so boring that we left in the interval.
   

• Choose one sentence that has the same meaning as the root one:

  Walking in the rain gives him pleasure.
   

• Choose one sentence that has the same meaning as the root one:

  ''I'll give you a lift home if you like'', he said
   

• Choose one sentence that has the same meaning as the root one:

  The plane had scarcely taken off when it crashed.