giải giúp mình với mình đang cần gấp

Ba số thay đổi x,y,z>1 thảo mãn điều kiện x+y+z =.Hãy tính GTNN của biểu thức M=(y-2)/X^2+(Z-2)/Y^2 +(x-2)/Z^2

Giải giúp em với ạ(vote 5* cho câu trả lời hay nhất) Cho ∆ABC vuông tại A có AB<AC, đường trung tuyến AM.Trên tia đối tia MA lấy D sao cho M là trung điểm của AD a.CM: ∆MAB=∆MDC b.Gọi K là trung điểm của AC.CM:∆BKD cân c.DK cắt BC tại O .CM :CO = 2/3 CM d.BK cắt AD tại N. CM : MK vuông góc với NO

Trả lời nhanh giùm mik nha mik cần gấp!!!

a,( 25 : 5 mũ 2 . 30 ) : 15 .7 b, ( 64 : 2 mũ 4 . 16 ) 32 . 48 c,( 81 : 3 mũ 3 .15 ) : 9 . ( 40 : 8. 2 ) giúp mình với nhé

V. Read the following passage and answer the questions below. Tropical rainforests are found in Amazon region of South America, Central America, Africa, and Southeast Asia. Rainforests are very important to the world's climate. The Amazon rain forests alone receive about 30 to 40 percent of the total rainfall on the earth and produce about the same percentage of the world's oxygen. Some scientists believe that the decreasing size of rainforests will affect the climate on the earth, making it uncomfortable or even dangerous for life. Saving our rainforests is an international problem. One country or even a few countries can not solve the problem alone. The nations of the world must work together to find a solution : giải pháp before it is too late. Questions • Where are tropical : thuộc nhiệt đới rainforests found? ………………………………………………………………… • How are rainforests to the world's climate : khí hậu? ……………………………………………………… 3. How many percent of the world's oxygen does Amazon rainforests produce? ……………………………………………………………………………………………………. 4. What do scientists think about the decreasing size of rain forests? ……………………………………………………………………………………………………. 5. Is saving ( save : gìn giữ) our rain forests only a national problem? ……………………………………………………………………………

giup minh voi a , minh dang can gap

ae giúp mik trình bày đầy đủ nha

III. Circle the mistake and correct it 1. On winter days, we all used to sit around the fire and told stories. ___________ A B C D 2. The Chinese build the Great Wall over two thousand years ago. ___________ A B C D 3. We get used to live in the countryside before we moved to Ho Chi Minh City. ___________ A B C D 4. In the modern world, people can easily communicate with telephone, radio, and computer. ______ A B C D 5. The package contain : chứa đựng books and records were delivered last week. ___________ A B C D

sắp xếp câu sau: blue / a (an) / umbrella/big /expensive / american