user-avatar
datnguyen19
2 năm trước
1. Cho tỉ lệ thức `a/b=c/d`. Chứng minh rằng: `{a+b}/{a-b}={c+d}/{c-d}` 2. Cho tỉ lệ thức `a/b=c/d`. Chứng minh rằng: `{ab}/{cd}={a^2-b^2}/{c^2-d^2}`
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Complete the sentences with conjunction: and, or, but, so . 1. We needed some food for the week, ................ we went to the supermarket. 2. Alan invested a lot of money in the business, ..................... the business went bankrupt. 3. Doug didn't unterstand the homework assignment, ................. he asked the teacher for help. 4. Susan thinks she should stay home and relax, ............ she should go on vacation. 5. The doctors looked at the x-rays, ............. they decided to operate on the patient. 6. Tom asked his teacher for help, .............. he asked his parents. 7. Jack flew to London to visit his Uncle, .............. to visit the National Museum. 8. It is sunny, ............. it is very cold. 9. Henry studied very hard for the test, .............. passed with high marks. 10. I would like to play tennis today, ............. I would like to play golf em đang vội mấy anh chị ơi giúp em với

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team