TÌM điều kiện xác định và rút gọn hộ mình (1/(√A+2)+1/(√A-2)).(√A-2)/(√A)

Cho x,y,z khác 0 và thỏa mãn: x + y + z =1/2. 1/ x 2 +1 /y 2 +1/ z 2 +1/ x y z =4. 1 /x +1/ y +1 /z >0. Tính giá trị của biểu thức: P =( y 2017+ z2017)( z 2019 + x 2019) + (x 2021 + y 2021)

tả một người mới gặp lần đầu để cho em ấn tượng sâu sắc (Theo mik là tả bác sĩ có dịch nữa nha ,cân nhắc có dịch và ko sao mạng)

Mọi ng giải hộ e 4,5câu này với ạ

Các bạn giúp mình viết một đoạn văn bằng tiếng anh bằng quá khứ đơn về bạn sẽ làm gì vào last week đi(không quá ngắn cũng không quá dài) Dịch giúp mình lun ạ Cảm ơn

Write a conversation between you and your friends using at least 3 sentences/questions with present simple tense and 3 sentences/questions with present continuous.

Giải thích và chọn đáp án giúp mình vs ạ

Giải phương trình:sin²x(1+sinx)+cos²𝑥(1+cos𝑥)=2cos²𝑥

Find ten mistakes in this passage and correct them. 'We interrupt your usual schedule to bring you an important news. We are receiving informations about a spaceship that has landed outside the White House. The large ship seems to be made of glasses. Reports say that a short time ago aliens came out of the craft. Eye-witnesses described them as short and said their clothes was made of metal and their hairs was bright green. Strangely, one of them appeared to be wearing a jeans. Much people said that they seemed to be friendly. The President of the United States is currently holding a meeting with the visitors in the hope that we can exchange knowledges. Police advice are to stay indoors and under no circumstances approach the spaceship. We will be back with another news as soon as we can. And now, back to your usual programme, Gardening for Beginners'.

31. Lan is ………………. than her sister. A. lazy B. lazily C. lazier D. lazilier 32. He feels ……….. than last year because his study results are ………………… A. happy/ good B. happier/ gooder C. more happy/more good D. happier/better 33. He is …………. at maths than at any other subjects. A. better B. more good C. goodlier D. gooder 34. Phuong can speak English ……….. than Minh. A. more fluent B. fluently C. fluent D. more fluently 35. Cinderrella danced …………… than any other girls at the ball. A.more graceful B. gracefuler C. gracefully D. more gracefully 36. Chemistry is …………….. than physics. A. easy B. easily C. easier D. more easily 37. Rabbits run……………… than tortoises. A. fast B. fastly C. fastlier D. faster 38. She can pronounce English words …………. than she could last term. A. correctlier B . more correct C. more correctly D. correcter 39. The country is ………….. than the city. A. quieter B . more quiet C. more quietly D. quietlier 40. In this class , the students are talking …………… than the teacher. A. loudly B. more loud C. loudlier D. louder. 41. I can learn a subject …………… if I like it and ………… if I don’t like it. A. good/ bad B. better/ worse C. better/ badlier D. gooder/worse 42. She is the most …………….. girl in our class. A. intelligent B. intelligentest C. tall D. tallest 43. That T¬shirt is the …………… we have in stock. A. big B.bigger C. small D. smallest 44. This hat is the ……………… of all. A. expensivest B. more expensive C. cheapest D. cheaper 45. Food becomes ………….. during the time of the flood. A. more scarcer B. most scarce C. scarcest D. scarce 46.Lan is the most ……………. student in my class. A. hard¬work B. hard¬working C. good D. best 47. This book is the ………………… of all A. bored B.boring C. more boring D. most boring 48. She has ……….. books than I do. A least B. fewer C. more few D. fewest 49. He finished the test …………..of all. A. rapidly B. the most rapidly C. most rapidly D. more rapidly 50. Many chemicals react ……………..in acid solutions A . more quick B. more quickly C. quicklier D. as quickly more