Cho hàm số y=fx liên tục trên R và có bảng xét dấu đạo hàm như hình bên. Hàm số y=fx nghịch biến trên khoảng nào sau đây?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  North America / home/ 514 million / South America / 371 million / Australia / 21 million

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

  campaign              clap                craft                 gratitude

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

  mutual                universal                usual               survey

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

  strategy               general           geography             great

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

  They say that the world's population reached over 6.70 billion in February 2008.

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

  minority                martyr            cosy                  loyalty

• Choose a word that has different stress pattern:

  campaign                performance               brighten               donation

• Choose a word that has different stress pattern:

  illiteracy               disadvantage                 anniversary              residential

• Choose a word that has different stress pattern:

   acquaintance               embarrassing               co-operate               helicopter

• Choose a word that has different stress pattern:

  expand           hostess                outlook                sneaky