Đáp án:
`1/2<x<=2`
Giải thích các bước giải:
`3){(2x-1>0),(x^2-2x<=0):}`
`<=>{(2x>1),(2x^2-4x<=0):}`
`<=>{(2x>1),(2x(x-2)<=0):}`
`<=>{(2x>1),(x-2<=0):}`
`<=>{(2x>1),(2x<=4):}`
`<=>1<2x<=4`
`<=>1/2<x<=2`
$\left \{ {{2x-1>0} \atop {x^2-2x ≤0}} \right.$
$⇔\left \{ {{2x>1} \atop {x(x-2)≤0}} \right.$
$⇔\left \{ {{x>\frac{1}{2} } \atop {0≤x≤2}} \right.$
$⇒\frac{1}{2}<x≤2 ⇔ x \in (\frac{1}{2};2]$
dựa vào văn bản phong cách hồ chí minh của lê anh trà viết đoạn văn diễn dịch 10-12 câu làm rõ nội dung "vẻ đẹp của phong cách hồ chí minh là sự kết hợp hài hòa giữa truyền thống văn hóa dân tộc và tình hình văn hóa nhân loại" đoạn văn có sử dụng phép nối và phép thế gạch chân chú thích ró Nhanh được không ạ vote 5s
V. Supply the correct form of the words in brackets. 1. The soup had a very ______ taste. (salt) 2. She covered the cake with a ______________ of sugar and whites of eggs. (mix) 3. Most children enjoy eating ______________ chicken and French fries. (fry) 4. The pineapple was sweet and ______________. (juice) 5. Meats and fish are ______________ used in all Vietnamese cooking. (common) 6. The chicken meat is ______________ and cut into thin slices. (bone) 7. It took about 30 minutes of ______________ and 40 minutes of baking. (prepare) 8. The sauce itself was ______________ and slightly sweet. (fragrance)
giúp em vs ạ!! trình bày đầy đủ giúp em vs nhé!!
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21. Would you like tea or coffee? - I'd …..........tea rather than coffee. A. hate B. prefer C. rather D. wish 22. Could I use your pen for the next test? A. Yes, you use B. Yes, you can C. Yes, you could D. Yes, you do 23. Do you like movie? - …………………………………………….. A. yes, we are B. I'd like C. Yes, quite a lot D. OK 24. Shall we go to the theatre this evening? - ……………………………… A. we shall go B. we go C. Yes, let's D. You're going 25. What do you think of Korean films? - …………………………………….. A. Yes, I do B. I like them C. No, I don't D. I think of them very much 26. Practice …………… English anywhere you can is a way to better your speaking skill A. to speak B. speak C speaking D. for speaking 27. When I was younger, I ................. to smoke or drink A wasn't used B. didn't used C never used D. not used 28. I wish I …………....... more chance to travel abroad. A. have B. had C. would have D. shall have 29. When …………………. English? A. has he begun to study B. has he begun study C. did he begun to study D. did he begin study 30. My mother doesn't like going to the theatre and ………………………. A. neither do I B. neither go I C. neither I like D. neither I am 31. He's a good guitarist, but he plays the piano ………………………… A. more better B. more well C. for good D. far better 32. Anyone who ......... his work won't be allowed to leave now. A. don't finish B. isn't finishing C. hasn't finished D. won't finish 33. Your hair is long. Are you going to ...........? A. have it cut B. have cut it C. be cutting it D. have it cutting 34. I can carry only one of these two boxes. Please carry ……………. A. another B. the other C. the others D. others 35. Mary .......... lazy preparing her lesson last night. A should be B. shouldn't be ‘ C. should have been D. shouldn't have been 36. I've got .................... money to lend you now. I think you can ask Lyn for some. A. few B. a few C. little D. a little 37. She forgot ............... off the cassette player before going to bed. A. turning B. to turn C. having turning D. to have turned 38. Finally they ......... rescue the people trapped in the burning houses. A. could B. succeeded to C. were able to D. can 39. There's nothing better to do; we watch the play on TV. A. may B. could have to C. must D. might as well
hỏi lần thứ 11 sắp đi học rồi ạ hứa sẽ vote =((((((((((((((999
Một xe máy đi từ A đến B hết 40 phút. Trong 10 phút đầu, xe đi với tốc độ 42 km/h; trong 20 phút sau đi với tốc độ 10 m/s. Và cuối đi với tốc độ 30 km/h. Tính chiều dài đoạn đường đã đi và tốc độ trung bình của xe.
phân tích thành nhân tử: x^3y-2x^2y^2+5xy 2x^2(x+1)+4x(x+1) 2/5x(y-1)-2/5y(1-y)
em hoàn toàn không biết giải bài này mong giáo viên giúp em
Mọi người giúp e với ạ e đang cần gấp
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