Cho các số thực dương theo thứ tự lập thành cấp số cộng và các số thực dương theo thứ tự lập thành cấp số nhân. Biết rằng và Giá trị nhỏ nhất của biểu thức bằng:         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  Everyone expects that the strike will end soon.
   

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

  The Chinese are believed to have invented gun power.
  
  

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

  The movie is supposed to be interesting.
   

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

  strange              splash              snack              stand

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

  speak            scream             spread             glean

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

  jumps              tenants            roofs             kids

• Choose a word that has different stress pattern:

  campground             discard              athlete             capture

• Choose the best answer for the following sentence:

  The girl _____________ with Dr. Zhang is my classmate.
   

• Choose the best answer for the following sentence:

  If you _______________ to me, you would have a lot of money by now.
   

• Choose the best answer for the following sentence:

  The Great Wall of China _______________ for about 6,000 km from east to west.