giúp em với ạ em đang cần gấp í ạ

Cho x,y ∈ R và x ² + y ² = 4 Tìm min, max của P = $\frac{x^{2} + y^2 +8 }{2x^2 +5xy+2y^2 +8}$

làm giúp em x+6 chia hết cho x (vì ko có dấu chia hết nên em viết bằng chữ)+

1. Tại sao nói dây thần kinh tủy là dây pha? 2. Trên một con ếch đã mổ để nghiên cứu rễ tủy, em Quang vô ý thúc mũi kéo làm đứt một số rễ. Bằng cách nào em có thể phát hiện được rễ nào còn, rễ nào mất?

X. Rewrite the following sentences, using the provided word keep meaning as that of the root one. 33. They often went to school by bike when they were young. => They used ………………………………………………….. 34. She has taught her children to play piano for 4 years. => She started ………………………………………………….. 35. It's a pity I can't cook as well as my mom. => I wish …………………………………………………….….. 36. Shall we use Perfume Pagoda as a theme of the presentation? => She suggests ………………………………………………….. XI. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital. 37. Finish your homework or you can't go out with your friend. (IF) => ………………………………………………………………..…… 38. They're not sure how they should operate the new system. (TO) => …………………………………………………………….... 39. It took me 4 hours to read the first chapter of the book. (SPENT) => …………………………………………………………….... 40. Snowboarding is more dangerous than tennis. (AS) => …………………………………………………………….... X. Rewrite the following sentences, using the provided word keep meaning as that of the root one. 33. He suggested visiting Moc Chau to learn about Thai and H'mong people. => What about________________________________________________ 34. They believe that touching the head of a Buddha statue is a sign of disrespect. => It ________________________________________________________ 35. It's a pity I can't get my visa extended. => I wish________________________________________________________ 36. "Please follow my instructions if you want to pass this module," my teacher said. => My teacher told me ________________________________________________ XI. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital. 37. There has been a slight drop in the number of people using public transport. (SLIGHTLY) => ________________________________________________________ 38. Revising for exams takes up all my time at the moment. (BUSY) => ________________________________________________________ 39. There was an increased demand for travel, so the government decided to invest in building the very first metro system. (AS) => ________________________________________________________ 40. I don't know much about historical events, so I can't help her with her history homework. (IF) =>________________________________________________________ X. Rewrite the following sentences, using the provided word keep meaning as that of the root one. 33. Their teacher is making them study hard. => They____________________________________________ 34. As I get older, I want to travel less. => The older________________________________________ 35. I have never been to Liverpool in my life. => Never___________________________________________ 36. My father speaks very little French. => My father speaks hardly ____________________________ XI. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital. 37. I will return to Hoi An to have another week of adventure this summer. (COME) => ______________________________________________________ 38. After leaving college, he started his own business with a bank loan. (SET) =>______________________________________________________ 39. She promised to meet me at the cinema this evening, but she didn't arrive. (TURN) =>______________________________________________________ 40. Nicholas began his trip to the remote farmhouse in Connecticut yesterday. (SET) =>______________________________________________________ giúp em với ạ mai em phải nộp rùi ạ:<

2. Complete the sentences by putting the verbs in brackets into the simple past or past perfect. 1. They (come) …………….. back home after they (finish) ………………… their work. 2. She said that she (meet) ……………………. Mr. Bean before. 3. Before he (go) ………………………….. to bed, he (read). ………………………… a novel. 4. He told me he (not/wear) ………………………… such kind of clothes before. 5. When I came to the stadium, the match (start) …………………………………. 6. Before she (listen) ………………….. to music, she (do)……………………. homework. 7. Last night, Peter (go) ………………….. to the supermarket before he (go) ………………… home. 8.The storm (destroy)……………. the tent that we (build). ………………… 9.Liz (not / be) …………….to New York before 2014. 10. When Johnathan (go)……………… out to play soccer, he (do / already) …………. his homework. 11. Kristen (eat) all the cake that our mom (make) ………………. 12.The doctor took off the plaster that she (put on) …………………two weeks before. 13.The waiter(bring)…………… a drink that I (not / order) ……………... 14. Kenny (cannot/ remember) ……………. the words we (learn)………… three weeks before. 15.My kids (collect)…………. coconuts that (fall) …………. from the tree. 16.(she / phone) …………. Jackie before she (go)………. to see him in Korea? 17. He (not / ride) ………………a horse before that day.

Trong bài thơ “ Khúc hát ru những em bé lớn trên lưng mẹ". Nguyễn Khoa Điềm viết: Mặt trời của bắp thì nằm trên đồi Mặt trời của mẹ con nằm trên lưng. Phân tích tác dụng của phép tu từ ấn dụ trong hai câu thơ trên. các bạn giải hộ mình nha

Một thửa ruộng hình thang có đáy lớn 60m, đáy bé bằng 2/3 đáy lớn và chiều cao 25m. Tính diện tính thủa ruộng hình thang đó

1 tế bào sinh dục của gà (2n=78) là nguyên phân nhiều lần liên tiếp , tổng số tế bào lần lượt sinh ra trong các hệ là 510 tế bào . Các tế bào con sinh ra trong thế hệ cuối cùng giảm phân tạo giao tử .biết hiệu suất thụ tinh của giao tử là 1,5625% và tạo được 16 hợp tử. XĐ số đợt nguyên phân của tế bào sinh dục nói trên?

Giúp em tìm trang ngữ trong đoạn văn này với ạ