viết biểu thức dưới dạng tích 1.12/5x^2 y^2 - 9 x^ 4 - 4/25 y^4

`n!` nghĩa là j `1!+2!+3!+...+n!` là sao

I.Make questions for the underlined parts of the following sentences 1.They plant many trees EVERY YEAR 2 .She always eats BREAD AND MILK for breakfast II.Complete the sentences with "although/despite'' 1 she went to school.....................she felt tired 2 we took many photos ...................she cloudy sky

Pháp luật và kỉ luật là j Nghĩa vụ của công dân là j

Tổng số hạt proton, notron, electron trong 2 nguyên tử kim loại A và B là 117, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 47, số hạt mang điện của B nhiều hơn A là 8. Tính số proton mỗi loại

Mệt thật mn ạ Ngồi bệnh viện sợ muốn chết Zẽ anime Lưu ý : tranh ms, có chữ kí, vẽ đẹp, ko spam và phạm luật

Complete the passage with the words in the box, then answer the questions bellow. (broken / invented / shortage / is / papermaking / exported) Paper was __________ (1) by the Chinese in the first century A.D. The art of papermaking took 700 years to reach the Muslim world and another 700 years to get to Britain. Most paper __________ (2) made from wood. When the trees are cut down, they are carried by land or water to paper mills. Here they are cut up and the wood is __________ (3) up into fibers, mixed with water and chemicals. This wood pulp is then dried up on a machine and made into paper. Papermaking is an important British industry, and paper from Britain is __________ (4) to South Africa, Australia and many other countries. Some of the wood used in British __________ (5) industry comes from trees grown in Britain, but wood is also imported from other countries such as Norway. One tree is needed for every 400 copies of a forty-page newspaper. If half the adults in Britain each day buy one daily paper, this uses up over 40,000 trees a day. Trees are cut down faster than they can be replaced, so there may be a paper __________ (6) before the year 2020. Answer the questions: 1.Who was paper invented by? -> ………………………………………………………………………………………….. 2.What is paper made from? -> ………………………………………………………………………………………….. 3.Where is paper from Britain exported to? -> ………………………………………………………………………………………….. 4.What is the passage about? -> ……...…………………………………………………………………………………..

Nhờ các mod giúp em 2 bài này với ạ!!!!

Làm hộ em đi chiều phải đi hc r

Nhờ các mod giúp em 2 bài này với ạQ!!!!