Cho hai số thực a, b thỏa mãn . Tập giá trị của là:           

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:

  dune                hummock                  shrub                   buffalo

• Choose the best answer for the following sentence:

  The team snatched a(n) ____________ victory in the last minute of the game.
   

• Choose the best answer for the following sentence:

  She drew a sharp distinction between _____________ and international politics.
   

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

  west               between                growth                  which

• Choose the best answer for the following sentence:

  An animal perfectly in ____________ with its environment is a perfect mechanism.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Desert is a large area of land that has very little water however very few plants growing on it.

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

  acacia                         aerial                     antelope                     gazelle

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

  rainfall                          catus                         camel                       jackall

• Find a mistake in the four underlined parts of the sentence and correct it:

  The Nile River, the Colorado River, but the Yellow River flow through deserts to deliver their sediments

  to the sea.

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

  crest                      stretch                          spinifex                        extend