Sau đó  có 6+3=9 bạn

ĐS 9 bạn

lấy ngẫu nhiên là được thôi

Xét hiệu: \(a^2+\dfrac{b^2}{4}-ab=\dfrac{4a^2-4ab+b^2}{4}=\dfrac{\left(2a-b\right)^2}{4}\ge0\)

Vậy : \(a^2+\dfrac{b^2}{4}\ge ab\)

Dấu '' = '' xảy ra khi a = \(\dfrac{b}{2}\)

sorry em mới học lớp 5

200 con duyệt nhanh

440 cm nha 222222222222

cò lạnh là cò ko nóng 

cò ko nóng là nòng ko có

540 cm vuong

1. Mr and Mrs. Brown have a son, Peter. (Parents)

-> Mr and Mrs. Brown are Peter's parents.

2. Trung goes to bed at ten fifteen.( Quarter)

-> Trung goes to bed at a quarter past ten.

3. How many classrooms are there in Julia's school? ( Have)

-> How many classrooms does Julia's school have ?

4. Our class has twenty -eight students. ( Are)

-> There are twenty-eight students in our class.

5. We finish classes at ten to twelve . ( Past)

-> We finish classes at eleven fifty

6. There is small garden in my school. ( Has)

-> My school has a small garden.

7. David's house isn't far from the station. (Near)

-> David's house in near the station

8. The bookstore is to the left of the toystore and to the rice of the police station. (Between)

-> The bookstore is between the toystore and the police station.

9. I cycle to school. ( By)

-> I go to school by bike

10. My father goes to work by car. ( Drives)

-> My father drives to work.