Tìm dư trong phép chia đa thức: a) f(x)=2x^5-70x^3+4x^2-x+1 cho x-6. Làm bằng 2 cách khác hẳn nhau
: Để trung hoà 300 ml hỗn hợp chứa HCl 0,7M và H2SO4 0,2M cần dùng V (ml) dung dịch chứa Ba(OH)2 0,3M và KOH 0,5M, thu được m gam kết tủa và dung dịch X. Cô cạn dung dịch X thu được a gam chất rắn khan. Tính giá trị của V, m và a. LÀM CÁCH ION
Hỗn hợp E gồm axit stearic, axit panmitic, và triglixerit X (tỉ lệ mol tương ứng là 5:3:2). Đốt cháy hoàn m gam E bằng O2 thu được 109,12 gam CO2 và 43,56 gam H2O. Mặt khác cho 2m gam E tác dụng hết lượng dư dung dịch KOH đun nóng, thu được sản phẩm hữu cơ gồm 3 muối và 3,68 gam glixerol. Phần trăm khối lượng của X trong E gần nhất là?
sin^6x+cos^6x+3sin^2x.cos^2x+tan^2x.cos^2x+cotan^2x.sin^2x
cho tam giác abc cân tại a (góc a =20 dộ) vẽ tam giác bdc đều ( d nằm trong tam giác abc )tia phân giác góc abd cắt ac tại m . cm am=bc giúp mình với mình cần gấp
Mark the letter A, B, C or D to indicate the most suitable response to complete each of the following exchanges. Question 27: “Well done! That’s a very nice picture!” “_________” A. Thanks. It’s nice of you to say so. B. Wow. What’s a nice compliment! C. Yes. I think so too. D. Right. I’ve painted a nice picture. Question 28: “Must I finish my homework now?” “_________” A. Yes, you may. B. Yes, you need. C. No, you can’t. D. No, you needn’t. Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 29: The graduation is sad, because the time we studied together has come to an end. A. succeeded B. begun C. finished D. changed Question 30: Under the major’s able leadership, the soldiers found safety. A. guidance B. intensity C. flagship D. ability Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 31: If you follow these simple rules, not only will you save money, but also the environment will be cleaner. A. earn B. count C. waste D. replace Question 32: Animal communication is not a straightforward subject. It’s complicated because animals communicate differently with each other. A. impossible to express B. difficult to understand C. easy to interpret D. interesting to study Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Jeans are very popular with (33)_________ people all over the world. Some people say that jeans are the “uniform” of youth. But they haven’t always been popular. The story of jeans (34)_________ almost two hundred years ago. People in Genoa, Italy made pants. The cloth made in Genoa was (35)_________ “jeanos”. The pants were called “jeans”. In 1850, a salesman in California began selling pants made of canvas. His name was Levi Strauss. Because they were so strong, “Levi’s pants” became (36)_________ with gold miners, fanners and cowboys. Six years later Levis began making his pants with blue cotton cloth called denim. Soon after, factory (37)_________ in the US and Europe began wearing jeans. Young people usually didn’t wear them. Question 33: A. rich B. old C. young D. poor Question 34: A. start B. starts C. was starting D. started Question 35: A. call B. calls C. calling D. called Question 36: A. famous B. popular C. good D. wonderful Question 37: A. workers B. drivers C. cowboys D. fanners Read the following passage and mark the letter A, B or C on your answer sheet to indicate the correct answer to each of the questions. Smoking causes lung cancer, which is the number one cancer among men. Ninety percent of the people who get lung cancer die. Smoking is also the leading cause of mouth cancer, tongue cancer, and throat cancer. Many smokers have heart disease arid pneumonia. Smoking causes one million early deaths in the world every year. Smokers not only harm themselves but also harm others. Smokers breathe smoke out into the air. They breathe it out on their children and their wives or husbands. Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non- smokers. We are all aware that smoking is bad. So why do people smoke?
Hướng dẫn viết cali nha NL:còn ai on không ta
vt calli buồn or yêu em or mãi yêu em 1 trong 3 nhé
giúp mk vs nhé ..................................
$\left \{ {{\frac{1}{x}+\frac{1}{y}= \frac{1}{16} } \atop {3x+6y=\frac{1}{4} }} \right.$ Giúp mình giải hệ phương trình này với ạ
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến