Cho hàm số , có bảng biến thiên như sau:   Mệnh đề nào dưới đây đúng ? .         

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Một số câu hỏi khác có thể bạn quan tâm.

• Cho 2,52 gam một kim loại tác dụng với dung dịch loãng tạo ra 6,84 gam muối sunfat. Kim loại đó là: 

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in  the following questions:

  We can protect the world in which we live. We, for example, can grow more trees and recycle rubbish.         

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions:

  She turned the radio on at 7.30. She was still listening to it when her mother came home at 9.00.  

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions: 

  Sue lives in a house. The house is opposite my house.  

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of the sentences in the following questions:  

  He is very lazy. That makes his parents worried.           

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of the sentences in the following questions:

  My mother is very busy at work . However, she takes good care of her children.           

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions:

  She tried very hard to pass the driving test. She could hardly pass it.

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

  He spent all his money. He even borrowed some from me.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in  the following questions:

  Jack was overconfident. Therefore, he ruined our plan completely.  

• Cho 2,4 gam Mg vào dung dịch HCl dư đến khi các phản ứng xảy ra hoàn toàn, thu được V lít (ở đktc). Gía trị của V là: