`(5-sqrt(5))/(sqrt(10)-sqrt(2))`
`=(sqrt(5).(sqrt(5)-1))/(sqrt(2).(sqrt(5)-1))`
`=(sqrt(5))/(sqrt(2))=(sqrt(5).sqrt(2))/(sqrt(2).sqrt(2))`
`=(sqrt(10))/2`
`\frac{5-\sqrt5}{\sqrt10-\sqrt2}=\frac{\sqrt5(\sqrt5-1)}{\sqrt2(\sqrt5-1)}=\frac{\sqrt5}{\sqrt2}=\frac{\sqrt5 .\sqrt2}{\sqrt2.\sqrt2}=\frac{\sqrt10}2`
Cali chữ VN vô địch Tradi, tone màu vàng và đỏ, ko đổi đề
Multiple choice 1. He has to narrow the trip down although / because / so he is enjoying it very much. 2. The table which / who / whose leg was broken has been repaired. 3. We should never cause / force / make others feel pessimistic. 4. Peter adores travelling, isn't he / doesn't he / didn’t he? 5. Jack said / wondered / told why the meeting had been cancelled. 6. They eat with their eyes, so you should marinate / garnish / purée the dishes. 7. I always remember the time which / where / when we spent together at that summer camp. 8. These plants will die if / unless/ although it rains. Gap fill 1. Jack never tells lies, _______he? 2. Michael Jackson was famous _______his performing style. 3. Jim doesn’t like rap music and I don’t_________. 4. Jane _______him if he would join the meeting. 5. I am very excited _______the coming game show on TV. 6. Tom isn’t satisfied with the test result and I’m not ________. 7. She _______mentioned you and your performance lately. 8. I’d like to buy a _______of lettuce, not a stick of celery. 9. _______the good meal, she didn’t eat anything. 10. Some students play games too much; ________, their study results are so bad. 11. She is fond of novels; ________, she has little time to read them. 12. That house is much _______comfortable than this one. giúp mik với
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1. Write the second sentence so that it has a similar meaning to the first. 1. Does Lan's school have twenty- five classrooms? => Are there..............................................................................................................? 2. My house is behind the park. => The park .............................................................................................................
1. The weather is quite (khá) fine. We can go fishing. →………………………………………………………………….. 2. He was so old. He kept quiet. →………………………………………………………………….. 3. He spoke slowly. We could understand him. →………………………………………………………………….. 4. Alice can stay at home alone because she is very brave. →………………………………………………………………….. 5. It’s very early, so we can go to the movies. →………………………………………………………………….. 6. I was free. I could help them with their work. →………………………………………………………………….. 7. It’s very nice. We should have a walk around the lake →………………………………………………………………….. 8. Her picture is beautiful. She can show it to the classmates. →………………………………………………………………….. 9. The film was extremely boring. We went to bed early. →………………………………………………………………….. 10. The soup is very excellent. We will have some. →………………………………………………………………….. 11. I have much time. I can do all the tests →………………………………………………………………….. 12. He is foolish. He told a lie to the police →………………………………………………………………….. II. Rewrite these sentences, using “enough” 1. The weather is too bad for us to have a walk. → The weather isn’t ………………………………… 2. The boy is too weak to do that work. → The boy isn’t ………………………………… 3. He ran too slowly to catch the first train. → He didn’t ………………………………… 4. The girl is too young to go to the super market alone. → The girl isn’t ………………………………… 5. The soup is too bad for them to eat. → The soup isn’t ………………………………… 6. The air is too dirty for us to breathe. → The air isn’t ………………………………… 7. The boy is too short to hang the pictures on the wall. → The boy isn’t ………………………………… 8. I am too weak to lift the heavy box up. → I am not ………………………………… 9. The film is too boring to broadcast again. → The film is not ………………………………… 10. The children got up too late to go there on time. → The children didn’t ………………………………… 11. The exercise is too difficult for the students to do. → The exercise is not ……………………………. 12. He works too slowly to finish it on time. → He doesn’t …………………………………………
mọi người làm nhanh nha cần gấp
Vẽ mầm cổ vũ VN mn nghĩ VN thắng ko dự đoán tỉ số
Trong những năm đi đánh giặc, nỗi nhớ đất đai, nhà cửa, ruộng vườn thỉnh thoảng lại cháy lên trong lòng anh. Đó là những buổi trưa Trường Sơn vắng lặng, bỗng vang lên một tiếng gà gáy, những buổi hành quân bất chợt gặp một đàn bò rừng nhởn nha gặm cỏ. Những lúc ấy, lòng anh lại cồn cào xao xuyến.” (Trích Đêm trăng hành quân về đồng bằng – Khuất Quang Thụy – TV5, tập 2) a) Đoạn văn trên, tác giả đã sử dụng những hình ảnh, âm thanh nào để diễn tả nỗi nhớ nhà da diết của anh bộ đội?
Nêu tất cả các cách chứng minh tứ giác nội tiếp đường tròn Giải thích chi tiết nhất có thể
Cho biết chữ số hàng đơn vị của phép tính `3xx33xx333xx3333xx...xx333...333` (Số cuối có `30225` chữ số `3`).
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