Cho phương trình  và đặt , ta được phương trình nào dưới đây?

Chia sẻ

Một số câu hỏi khác cùng bài thi.

• Phương trình có nghiệm là ?            

• Cho phương trình  và đặt , ta được phương trình nào dưới đây?

• Cho a là số thực dương khác 1 và thỏa mãn . Tìm .               

• Nghiệm của bất phương trình $9^x<3^{x+1}+4$ là
  
  

• Cho bất phương trình Khi đặt ta được bất phương trình nào dưới đây?         

• Cho phương trình . Khi đặt , ta được phương trình nào sau đây?  

• Phương trình có tập nghiệm là:

• Gọi là hai nghiệm của phương trình Giá trị của biểu thức bằng:         

• Tìm tổng các nghiệm của phương trình    .

• Gọi  là hai nghiệm của phương trình  Khi đó:         

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  She ______________________ to get her breath back and then carried on jogging.

    

• Choose the best answer for the following sentence:

  The more they tried to get her to talk about her experiences, the further she

  retreated back into her __________________________ .

    

• Choose the best answer for the following sentence: 

  The manager  _________________________ and ______________________ you in a few minutes.

   

• Choose the best answer for the following sentence: 

  Water when _______________________ always __________________________ off steam.

   

• Choose the best answer for the following sentence:

  Since the ditch is full of water, ___________________________ last night.

   

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

  We should eat more fruit and vegetables to prevent ourselves from cancer.

   

   

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

  You helped me so I could escape from being broke.

   

   

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

  They must be watching a film.  

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

  As he has just had lunch, he cannot be hungry.

   

   

• Read the following passage and choose the best answer for each blank:

                                        THAT'S WHAT FRIENDS ARE FOR
          It was beautiful Sunday afternoon. The sun (1)________ shinning brightly and a gentle breeze blew in from the sea. Jim was (2)_________ his bicycle along the coast. Suddenly he lost control of his bicycle. It went off the track and crashed into a rubbish bin. Jim cried: "Oh, my leg hurts!" Some passers-by rushed (3)_________ him. Long time after, an ambulance arrived (4)______ him to the hospital. Jim had broken his leg. It had to be put in a cast.
          Two weeks later, Jim (5)_________ back in school. He hobbled slowly to class on his crutches. His friends, Tony and David, offered (6)__________ him. Lily carried his bag while Kate helped him to his seat.
          John, the class bully, shouted from the back of the classroom: "Look, here comes the one-legged monster! One-legged monster!" Jim looked very hurt. It was very mean of John (7)____________ Jim names.
         Soon it was recess. "I'll buy some food for you, Jim. What would you like (8)______?" asked Kate.
         Jim looked unhappy. "I wish I could play with the others now."
         Lily comforted him. "Don't worry, you'll get well soon."
  Every day, Tony and David kept Jim (9)___________ . They cheered him up with stories and jokes. Jim looked at them gratefully. "I'm glad (10)________ friends like you," he smiled.

   

  1. A. is                       B. are                        C. was                          D. were
  2. A. going                 B. driving                  C. travelling                   D. riding
  3. A. to help               B. help                      C. helps                         D. helped
  4. A. to give               B. to send                 C. to see                        D. examine
  5. A. is                       B. are                        C. was                            D. were
  6. A. to help               B. help                      C. helped                        D. helping
  7. A. call                     B. calling                   C. to call                          D. called
  8. A. eat                     B. to eat                   C. eating                         D. ate
  9. A. company            B. companies            C. to company                 D. companying
  10. A. have                B. having                  C. had                              D. to have