cho A = ( 1; 2] , B = [3; 4]. A\ B là gì? giải thích ! phần này mình chưa hiểu rõ cho lắm

-3xy(x+y)-3xyz [ giải giúp em theo cách đặt nhân tử chung, giải theo từng bước một cho dễ hiểu giùm em ạ ]

Hãy viết 1 thông báo ngắn cho hs toàn trường biết:“Phòng chống dịch covid-19 tốt,chống dịch như chống giặc"

Viết một đoạn văn cảm nhận khoảng 8 dòng về phim ngắn Điều kì diệu của những viên phấn

Giúp Với đúng đủ cho 5 sao và 20đ

Nguyên tử nguyên tố X có tổng số hạt là 193 hạt, trong đó số hạt proton là 56 hạt.

lập dàn ý chung thuyết minh về 1 tác phẩm văn học

nhanh giúp em với ạ em sẽ vote 5 sao

1. Làm tròn số 34,9037 đến hàng đơn vị là: A. 34 B. 34,9 C. 35,0 D. 35

All the time he was growing (0) ________, colour did not exist for Londoner Brian Langridge. Brian (1)_______ born with a very rare eye defect, affecting only one in a million people, which meant he could only see things in black and white. Then at the age of 21, he heard about some revolutionary new contact lenses developed (2) _______ British scientists, and he decided to save (3)________ the $600 needed to buy a pair. In (4)________to raise the money, Brian had to (5) _________ overtime in his job at a local supermarket. But he was careful (6) _____ to build his hopes up too high. "The opticians had always told me that nothing could be (7) _____ to help me because I was so severely colour blind," says Brian. "Consequently, I didn’t get too excited about the lenses in (8) ______ they didn’t work for me." He needn’t have worried, though; as soon as he put them on he began to see the world in all its colour. "I had to get a friend to spend the first day with me so that he could tell me which colours were which, because I had absolutely (9) ________ idea. It was just amazing." Now, as a result of being (10) ________ to distinguish between different on-screen colours, Brian has began a new career working with computers. Mọi người ơi giúp mình với ạ