Tìm giới hạn 1. lim [{căn(3x^2+x^4)} / {2x}] x--> 0 2. lim [{x.|x+2|} / {x^2+3x+2}] x--> (-2)+

Descrribe a country you would like to visit, ( 1 đoạn văn từ 80-100 từ )

Tìm giới hạn 1. lim [{2x^2+x-10} / {x^3-8}] x-->2- 2. lim [{x^2-4x+3} / {x^2-6x+9}] x-->3+

1. Một đám đất hình thang có trung bình cộng hai đáy là 80,6m. Người ta mở đám đất bằng cách tăng thêm đáy lớn 3,5m ( hình vẽ ) thì diện tích tăng thêm 52,5m2. Tính diện tích đám đất sau khi mở rộng. 2. Có hai khối lập phương. Tỉ số thể tích của chúng là 5/6. Thể tích khối lập phương nhỏ là 58cm3. Tính: a/ Thể tích khối lập phương lớn. b/ thể tích khối lập phương lớn bằng bao nhiêu phần trăm thể tích khối lập phương bé

I. Choose the word whose underlined part is pronounced differently from that of the other words. Question 1: A. A. finished B. marched C. stopped D. robbed (-ed) Question 2: A. letters B. books Ccats D. accidents (-s) Question 3 : A. death B. Eaten C. deal D. feat (-ea) Question 4: A. stop B. post C. offer D. from (-o) Question 5 : A. Asian B. basketball C. tennis D. solidarity (-s) II.Choose the best answer to complete the following sentences. Question 6 : Do you know when the 2006 Asian Games took place? A. happened B. deepened C. added D. struggled Question 7 : You have got a new car, ……….? A. do you B. aren’t you C. don’t you D. haven’t you Question 8 : The paintings _________ Mr. Brown has in his house are worth around $100.000 A. whose B. which C. what D. whom Question 9 : More and more rare animals are _______danger of extinction. A. for B. on C. at D. in Question 10 : The city of London was founded by the Romans in the year 43 AD. A. established B. located C. developed D. characterized Question 11 : It was me who………you last night. A. calls B. called C. call D. To call Question 12 : Linda: "Excuse me! Where's the post office?" Maria: "______." A. I'm afraid not B. Don't worry C. Yes, I think so D. It's over there Question 13 : When he ______, we ______ dinner. A. arrived/having B. was arriving/had C. arrived/ were having D. had arrived/had Question 14 : Laura had hurt her leg and she _____________walk very well A. could B. couldn’t C. can D. can’t Question 15 : The man _________ his car outside hasn’t come back for it yet. A. who left B. who he left C. whom he left D. whose Question 16 : The man a black suit is a football referee. A. to wear B. wearing C. who wear D. wears. Question 17 : This shirt is too big for me, ………….? A. is it B. isn’t this C. isn’t it D. doesn’t it Question 18 : Natural parks should be set ____________to save animals and plants. A. into B. out C. up D. down Question 19 : Mr. Pike -------------------- the most famous archaeologist in our city. A. says to be B. is said to be C. is said that D. said to be Question 20 : People say that six out of the seven wonders of the ancient world were destroyed. A. It was said that six out of the seven wonders of the ancient world were destroyed. B. Six out of the seven wonders of the ancient world is said to be destroyed C. Six out of the seven wonders of the ancient world are said to have been destroyed. D. Six out of the seven wonders of the ancient world is said to have destroyed. III- Tìm lỗi sai Question 21 : You and I went there together , weren’t we ? Question 22 : : It was Mrs Lan who was give a lot of friends by her students. Question 23 : George are said to be planning another trip to Greece Question 24 : He works at Heathrow Airport, that is one of the big airports in the world. Question 25 : The girl who name's Alice gave you this letter.

Tìm giới hạn 1. lim [{x-2} / {căn(x^2+5) - 3}] x-->2+ 2. lim [{1 - căn(x-2)} / {x^2-9}] x-->3-

Giúp mình với ạ cảm ơn các bạn nhiều

tìm x biết:|x-1|+|x-2|+|x-3|+...+|x-100|=101

Giải hộ nhé....giải thích rõ chi tiết các bước làm

Cho tam giác ABC vuông tại A, đường cao AH. Trên tia đối của tia AH lấy điểm D sao cho AD = AH. Gọi E là trung điểm của HC, M là trung điểm của DC, F là giao điểm của DE và AC. a) Chứng minh ba điểm H, F, M thẳng hàng. b) Chứng minh HF=1/3DC c) Qua E kẻ đường thẳng vuông góc với AB cắt AH tại P. Chứng minh CP vuông góc với BD.