mà tui sư tử

Giả sử a+b >2 thì a³ + b³ + 3ab (a+b)>8

⇔ ab(a+b) > 2

⇔ab(a+b) > a³ + b³

⇔(a−b)²(a+b) < 0

vô lý nên a+b ≤ 2   (đpcm)

Tìm giá trị lớn nhất, giá trị nhỏ nhất của hàm số sau: y = 2 sin 2 x + cos 2 2 x

tui bào cáo r

bạn đợi tới chiều hay trưa thì sẽ có người giúp chứ mình mới lớp 6 mà bạn lớp 8 mình làm được ít lắm

                               My dream school

My dream school is on the sky. My school name is "garden on the sky". I go to school by cloud bus. In my school, there are lots of modern equipment. We learn subjects in the computer, swim in a big pool on the sky behind the scool. It's great. There are 200 students and 30 teachers in my school. I like Maths, Science and Swimming because there are very interesting. Break time, I and my friends play on the sky, in the playground. I skip, play hide and seek.

               After school, I walk into the cloud bus and fly home. The school is great and I dream about it!

                WELCOME TO MY SCHOOL!

my school's name is Thực Ngiệm primary school bla bla bla bla

1.it is a long seat for two or more students to sit on in the classroom 

...a desk..........................

2. They are of different colours. You draw and colour with them

....a crayon..........................

3. it has many letters and words .you use it to look up new words

......dictionary.........................

4. it is a small book of blank paper for writting notes in

...a notebook...............................

5. there are 32 pieces used in the game of chess. You use them in playing chess

...chessman................................

6. it is a large picture printed on paper and you put it on a wall as decoration

...a poster.............................