Cho các số thực a,b,c thỏa mãn đk a^2+b^2+c^2=1.Hãy tìm giá trị lớn nhất của biểu thức sau:

A=x^3+y^3+z^3-3xyz

A=-1/2-.2/3....-9/10=-1/10<-1/9

A

dễ

chỉ tội ko thi từ vòng 1

1.D

2.C

chất lỏng,chất khí và thể plasma

có ai bt xác định điểm rơi của bđt bunhiacopski ko

tôi nhìn thấy quy tắc r

1.The second question was more difficult than the first question

2.The brown coat is bigger than the black coat

3.The sofa is more comfortable than the chair

4.Jack's suitcase was heavier than Jim's suitcase

5.My homework was worse than his homework

6.The small television is cheaper than the big one

7.The Holton Hotel is more modern than the Royal Hotel

8.The weather today was better than it is yesterday

9.People in the country are more friendly than those in the city

10.Life in the country is more boring than life in the city

11.Lam is the tallest in my class