Cho hàm số  . Giá trị  bằng:         

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Một số câu hỏi khác có thể bạn quan tâm.

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

  ''You had better not cross the forest at night,'' Peter said.

   

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

  right / you / see / come / to / will / I / my / after / exam

   

   

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

  must / now / say /, / ''Happy Birthday'' / and / I

   

• Choose a word that has different stress pattern:

   volunteer                 agreement                   experience                   remedial

• Choose a word that has different stress pattern:

   develop               discover                  different                 promotion

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

   obliged                environment                    literacy                  divide

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

  attain              main               certain               campaign

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

   developed                    discovered                       worked                     expressed

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

   pleasure                    task                  firsthand                  special

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

   mutual                  teenager                    promote                    listen