Giúp em với ạ . Huhu . Gấp lắm

Cho a/b là phân số tối giản. Chứng minh rằng phân số 3a / a-4b cũng là phân số chưa tối giản.

I. Choose the word having the underlined part pronounced differently in each line. 1. A. wished B. gripped C. loved D. liked 2. A. excited B. enjoyed C. bored D. amazed 3. A. laughed B. ended C. shocked D. missed 4. A. advertised B. murdered C. performed D. approached 5. A. produced B. terrified C. entertained D. engaged 6. A. typed B. missed C. walked D. cleaned 7. A. satisfy B. actor C. able D. map II. Complete the following sentences with “because (of)”, “(al)though/even though /despite/ in spite of”. 1. __________________________ he worked hard, he didn’t receive any praise. 2. He ate the chocolate cake ______________________ he is on diet. 3. ____________________ the high prices, my daughters insist on going to the movies every Saturday. 4. ________________________ it was cold, I went aout. 5. ________________________ John didn’t study hard, he succeeded. 6. We took many picture ________________________ the cloudy sky. 7. _________________________ her poor memory, the old woman told interesting stories to the children. 8. She went home early _______________________ she didn’t feel well. 9. I couldn’t get to sleep __________________________ the noise. 10. The students arrived late_________________________the traffic jam. III. Rewrite sentences: 1. Although I have a lot of money, I am not very satistied. DESPITE ________________________________________________________________________ 2. Although it rained, they still go fishing. IN SPITE OF _______________________________________________________________________ 3. Although she works hard, she doesn’t get good results. DESPITE ________________________________________________________________ 4. Although he is a singer, he sings badly. IN SPITE OF _______________________________________________________________ 5. Although the exercise is difficult, she can do it easily. DESPITE 6.He isn’t happy although he is very rich. DESPITE __________________________________________________________________ 7. Even though he got a good job, he was not satisfied. INSPITE OF ____________________________________________________________ 8. Mary didn’t go to school yesterday because she was sick. BECAUSE OF _____________________________________________ 9. She went to bed early because she felt tired. BECAUSE OF ____________________________________________________________ 10. I can’t sleep because the weather is hot. BECAUSE OF

Cho 11,88 gam kim loại M tác dụng hết với HNO 3 đun nóng giải phóng 0,15 mol hỗn hợp N 2 O và N 2 có d/H 2 = 18,8. M là

giúp tui. tìm số nguyên x biết -13.|x|= -26

x^2 - 2(m+1)x + 2m + 10 = 0 tìm m để pt có 2 nghiệm x1 x2 sao cho A = x1^2 + x2^2 + 10x1x2 đạt giá trị nhỏ nhất

giúp mình 2 bài 9 và bài 10 nha mn

Các bạn giúp mik giải Bài 2;3;4 của các đề 8;9;10;11 nhé Mik cần gấp

mik giup giảicho biểu thức A=(1/x-1/y)(x-y/x+y-x+y/x-y) rút gọn A tính gt của A biết x =6

Bài 14: Hoàn thành câu sau sử dụng các liên từ “although/ because/ but/ so”. ( Chú ý: HS chép đầy đủ vào vở) 1. ___________ Norway is a beautiful country, it is very cold in winter. 2. It is warm and sunny today ___________ we are going to the beach. 3. The car is very old ___________ it is reliable. 4. Today is my daughter’s birthday, ___________ I need to buy her a present. 5. You should take an umbrella ___________ it is going to rain. 6. The camera is expensive ___________ it is very good. 7. I love chips ___________ it is not healthy. 8. His mother is not feeling well, ___________ he needs to take care of her. 9. Your marks in English are low ___________ you don’t study hard enough. 10. ___________ he is a good ski instructor, I don’t like him very much. 11. I’d like to go with you ___________ I’m too busy right now. 12. There are no buses this hour, ___________ we need to catch a taxi. 13. ___________ it rains a lot in winter, I like walking the dog in the park. 14. He fails his driving test, ___________ he needs to do it again. 15. We invite them to the party ___________ they don’t want to come. 16. I don’t like the concert ___________ the band doesn’t play well. 17. We don’t go on holiday ___________ we don’t have a lot of money. 18. I want to buy a car ___________ I need it for my job. 19. I’m learning French ___________ I want to live in Paris. 20. ___________ he’s got a car, he never drives to work.