ban thu lay que tam ra ma tinh

dap so:3 cach

1/1.3; 1/3.5; 1/5.7; ...;

=> P/s thứ 20 là: 1/39.41 = 1/1599

Động vật nào sau đây có dạ dày đơn?

A. Bò

B. Trâu

C. Ngựa

D. Cừu

Read the passage below and decide whether the statements are TRUE or FALSE?

I’m Bing. My grandmother told me that our village used to be very poor many years ago. The villagers had to work hard in the fields all day but they could not earn enough for their living. Their lives were very simple. Many people had to live in houses made of straw and mud. Nowadays my village has changed a lot. People live in big brick houses. In the evening, they can listen to the news on the radio or watch TV for entertainment. All people in my village try their best to make their living better. They raise and resurface the roads so that the roads will not be muddy and flooded after it rains.

Question: The road has been renovated to improve living standard.

A. True

B. False

3900:25=156

số học sinh trường đó là 257

Cho  u → 2 ; - 1 ; 1 ,   v → m ; 3 ; - 1 ,   w → 1 ; 2 ; 1 . Với giá trị nào của m thì ba vectơ trên đồng phẳng

A.  3 8

B. - 3 8

C.  8 3

D. - 8 3

|x - 2| = 3

=> x - 2 = 3

x = 5

hoặc x - 2 = -3

x = -1

Vậy ...

A = (.........)