user-avatar
thaomeo14
2 năm trước
Cho x, y, z $\geq$ 0 và x+y+z$\leq$ 3 Tìm giá trị nhỏ nhất của A=$\frac{1}{1+x}$ +$\frac{1}{1+y}$ +$\frac{1}{1+z}$
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mark the letter A, B, C or D on your answers sheet to indicate the correct answers to each of the following questions from 23 from 30. Question 23: Many elderly people have to live on the money, they _______ when they were working. A. put back B. set up C. laid up D. put aside Question 24: My uncle pulled a few _______ and got me a job in the company he works. A. ropes B. threads C. chords D. strings Question 25: Da Vinci’s Mona Lisa is _______ ; if I was destroyed, no mount of money could ever replace it. A. priceless B. valueless C. worthless D. invaluable Question 26: Nowadays, most students use _______ calculators in their studies and examinations. A. electric B. electrified C. electrical D. electronic Question 27: Fort Niagara was built buy the French in 1762 on the land _______ the Seneca Indians. A. buying from B. bought from C. they buy from D. was bought from Question 28: _______ around us gives us vital imformation about our environment. A. That the hearing of sounds B. Whatever the sounds are heard C. The sounds are heard D. Hearing the sounds Question 29: _______ , let me khow as soon as possible. A. Should you hear anything B. Hearing anything C. Hear anything D. Do you hear anything Question 30: _______ in astronomy, the discovery of Uranus was by accident A. It was like many finds B. Alike many finds C. Many alike finds D. Like many

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team