cho a ≥b ≥0. CMR a-b ≥ ( √a - √b ) ² MỌI NGƯỜI GIÚP MÌNH VỚI Ạ, THANKS MỌI NGƯỜI!=))

Cho tam giác ABC cân tại A và hai đường trung tuyến BM, CN cắt nhau tại k. Chứng minh 1.tam giác bnc bằng tam giác cmb 2.tam giác BKC cân tại A

Rút gọn: `4x-4`$\sqrt{x}$`+1-x^2`$\sqrt{x}$`+x^2`

loooooooooooooooooooooooooooooo

A = 1+ 1 phần 2+ 1 phần 3+...+1 phần 255<8

Một lớp học có 40 học sinh, trong giờ ra chơi giáo viên chủ nhiệm đã vận động các bạn quyên góp ủng hộ quỹ vaccine Covid 19 do trường phát động biết rằng số học sinh nam nhiều hơn số học sinh nữ, mỗi bạn nam ủng h ộ 5000 đồng, m ỗi bạn nữ ủng 8000 đồng và giáo viên ch ủ nhiệm bỏ t hêm 743000 đồng để đủ hạn mức tối thiểu nhà trường đề ra cho mỗi lớp. Biết rằng hạn mức tối thiểu của mỗi lớp cần ủng hộ để chung tay giúp đỡ góp phần nh ỏ vào quỹ vaccine là 1000000 đồng. H ỏi nếu m ỗi h ọc sinh nam đóng góp 12000 đồng và m ỗi học sinh n ữ đóng góp 10000 đồng thì giáo viên chủ nhi ệm c ần phải b ỏ thêm vào qu ỹ bao nhiêu t iền thì m ới đủ hạn mức tối thiểu quyên góp của lớp để chung tay góp phần phòng chống dịch Covid 19.

có giải thích!! 71) The reason ____ Jim has just lost his job is that he didn’t work hard enough. A. why B. which C. that D. B & C are correct 72) They hid the money in a place ____ it was safe from robbers. A. which B. where C. that D. All are correct 73 ) Please tell me the reason for ____ I should let you go. A. that B. which C. why D. B & C are correct 74) I know a wood ____ you can find wild strawberries. A. where B. which C. that D. All are correct 75) Can you suggest a time at ____ it will be convenient to meet? A. which B. when C. why D. that 76) Is there any reason for ____ you should have a holiday? A. why B. which C. that D. A & B are correct 77) Tell me the countries ____ the traffic moves on the left-hand side. A. where B. which C. that D. A & B are correct 78) We keep our bread in the bridge ____ it doesn’t go bad. A. since B. so that C. although D. after 79) ____ these cars are cheap, they last a long time. A. Because B. In order that C. Although D. After 80) You should give the iron time to heat up ____ you iron your clothes. A. because B. so that C. even though D. before

60đ nên làm chi tiết đầy đủ nha ^^

Vẽ anime <digi> Hóng mí Idol :>>>

VIII COMPLETE SENTENCES WITH TOO OR EITHER 1. They often go to the library on Sunday afternoon. He . . . . . . . ……………………. 2. Lee can speak Japanese. I . . . . . . . . . . . . . . …………………..……………….. 3. Nam didn’t see the train. Nga . . . . . . . . . . . . . . …………………..……………….. 4. Linh will fly to China next month, and he . . . . . . . . . . . . . . …………………….. 5. The books aren’t red. And the ruler . . . . . . . . . . . . . . . ………………….. 6. Today is hot, and Yesterday . . . . . . . . . . . . . . . ………………….. 7. The boys don’t smoke cigarettes and the girls . . . . . . . . . . . . . . …………… 8. I don’t know her and he. . . . . . . . . . . . . . . ………… 9. I likes eggs. and her brothers . . . . . . . . . . . . . . . ………………….. 10. I stayed at home last night, and they . . . . . . . . . . . . . . . ………… IX. COMPLETE SENTENCES WITH TOO OR EITHER 1 We often go to the library on Sunday afternoon. They . . . . . . . ………………….. 2.Susan can speak Japanese. Tom . . . . . . . . . . . . . . ………………….. 3.Minh didn’t see the train. Nga . . . . . . . . . . . . . . ………………….. 4.Hoa will fly to Hong Kong next month, and her mother . . . . . . . . . . . . . . ………………….. 5.The pineapples aren’t ripe. And the durians . . . . . . . . . . . . . . . ………………….. 6.March is hot, and May . . . . . . . . . . . . . . . ………………….. 7.The boys shouldn’t smoke cigarettes and the girls . . . . . . . . . . . . . . ………………….. 8.I don’t know how to use a computer and my friends . . . . . . . . . . . . . . . ………………….. 9.She likes eggs. and her brothers . . . . . . . . . . . . . . . ………………….. 10.They stayed at home last night, and their children . . . . . . . . . . . . . . . ………………….. X. COMPLETE SENTENCES WITH SO OR NEITHER 1. We went to the library on Sunday afternoon. . . . . . . . . . . . they 2. Susan can’t speak Japanese. . . . . . . . . . . . her sister 3. Minh sees the train. . . . . . . . . . . ..his friends 4. Hoa won’t fly to Hong Kong next month, and. . . . . . . . . . . her mother 5. The pineapples are ripe,and. . . .. . . . . . . . the durians 6. I like Spring, and. . . .. . . . . . . . .she. 7. The spinach is dirty, and. . . . . . . . . . . .the cabbages. 8. You mustn’t stop here, and. . . . . . . . . .they. 9. He didn’t eat beef and . . . . . . . . . his wife. 10. she liked detective movies and . . . . . . . .. .her husband. XI. COMBINE INTO ONE SENTENCE WITH TOO OR EITHER( THEN USE SO OR NEITHER) 1. They can play tabletennis. We can play tabletennis. 2. He sings love songs very well. His sister sings love songs very well. 3. I wrire diary every night. My mother wrires diary every night. 4. My father doesn’t drink beer. My mother doesn’t drink beer. 5. She is swimming in the pool. Her children are swimming in the pool 6. Hoa ate bread with milk for breakfast. Hoa’s uncle ate bread with milk for breakfast 7. She didn’t watch TV last night. Her husband didn’t watch TV last night. 8. They mustn’t stay up late. Their friends mustn’t stay up late. 9. Milk is good for your health. Fruit juice is good for your health. 10. Betty does morning exercise. Betty’s aunt does morning exercise. XII/ USE SO / TOO/ NEITHER /EITHER 1. I’m feeling tired. ( I ) ………. …………… . 2. I don’t like eggs. ( she) ……………………………….. 3. I need a holiday.( They) ……………………………….. 4. I don’t like milk. ( Lan ) ……………………………….. 5. I can’t get up this morning.( He) …………………….. 6. I like a cup of tea.( She) ………………………………. 7. I live in Africa. ( They)………………………….. 8. I was ill yesterday. ( He) ………………………………… 9. I will go to Hue( They). ……………………………….. 10. I got a gift ( She) . ………………………