Giúp mình bài này vs nha mình đag cần gấp lắm . Mình cảm ơn nhiều lắm ><
Talk about a traditional craft village you knows (khoảng 5-6 câu )
K
Khách
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18 tháng 2 2021
1) Vì x=25 thỏa mãn ĐKXĐ nên Thay x=25 vào biểu thức \(A=\dfrac{\sqrt{x}-2}{x+1}\), ta được:
\(A=\dfrac{\sqrt{25}-2}{25+1}=\dfrac{5-2}{25+1}=\dfrac{3}{26}\)
Vậy: Khi x=25 thì \(A=\dfrac{3}{26}\)
2) Ta có: \(B=\dfrac{\sqrt{x}-3}{\sqrt{x}+1}+\dfrac{2x+8\sqrt{x}-6}{x-\sqrt{x}-2}\)
\(=\dfrac{\left(\sqrt{x}-3\right)\left(\sqrt{x}-2\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}+\dfrac{2x+8\sqrt{x}-6}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}\)
\(=\dfrac{x-5\sqrt{x}+6+2x+8\sqrt{x}-6}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}\)
\(=\dfrac{3x+3\sqrt{x}}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}\)
\(=\dfrac{3\sqrt{x}\left(\sqrt{x}+1\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}\)
\(=\dfrac{3\sqrt{x}}{\sqrt{x}-2}\)
J
3
Y
28 tháng 6 2023
\(a,A=0,2\left(5x-1\right)-\dfrac{1}{2}\left(\dfrac{2}{3}x+4\right)+\dfrac{2}{3}\left(3-x\right)\)
\(=x-0,2-\dfrac{1}{3}x-2+2-\dfrac{2}{3}x\)
\(=\left(-0,2-2+2\right)+\left(x-\dfrac{1}{3}x-\dfrac{2}{3}x\right)\)
\(=-0,2\)
\(b,B=\left(x-2y\right)\left(x^2+2xy+4y^2\right)-\left(x^3-8y^3+10\right)\)
\(=x^3-8y^3-x^3+8y^3-10\)
\(=-10\)
\(c,C=4\left(x+1\right)^2+\left(2x-1\right)^2-8\left(x-1\right)\left(x+1\right)-4x\)
\(=4\left(x^2+2x+1\right)+\left(4x^2-4x+1\right)-8\left(x^2-1\right)-4x\)
\(=4x^2+8x+4+4x^2-4x+1-8x^2+8-4x\)
\(=13\)
H9
HT.Phong (9A5)
CTVHS
28 tháng 6 2023
a) \(A=0,2\left(5x-1\right)-\dfrac{1}{2}\left(\dfrac{2}{3}x+4\right)+\dfrac{2}{3}\left(3-x\right)\)
\(A=x-\dfrac{1}{5}-\dfrac{1}{3}x-2+2-\dfrac{2}{3}x\)
\(A=\left(x-\dfrac{1}{3}x-\dfrac{2}{3}x\right)-\left(\dfrac{1}{5}+2-2\right)\)
\(A=-\dfrac{1}{5}\)
Vậy: ...
b) \(B=\left(x-2y\right)\left(x^2+2xy+4y^2\right)-\left(x^3-8y^3+10\right)\)
\(B=\left[x^3-\left(2y\right)^3\right]-\left[x^3-\left(2y\right)^3\right]-10\)
\(B=-10\)
Vậy: ...
c) \(4\left(x+1\right)^2+\left(2x-1\right)^2-8\left(x+1\right)\left(x-1\right)-4x\)
\(=4\left(x^2+2x+4\right)+\left(4x^2-4x+1\right)-8\left(x^2-1\right)-4x\)
\(=4x^2+8x+4+4x^2-4x+1-8x^2+8-4x\)
\(=\left(4x^2+4x^2-8x^2\right)+\left(8x-4x-4x\right)+\left(4+1+8\right)\)
\(=13\)
Vậy:...
TT
1
KY
9 tháng 9 2021
Refer
1. “Your cousin speaks English very well” Paul told me
Paul said that ___________my cousin spoke English very well____________
2. “The man broke out of prison yesterday” said the policeman
The policeman told us_that the man had broken out of prison the day beforr__
3. “I’ll lend you this book as soon as I finish it” Owen said to me
Owen said __me that he would lend me that book as soon as he finished it___
4. “I think I forgot to turn off the lights this morning” Brenda told Brian
Brenda told Brian ____that he thought he had forgotten to turn off the lights that morning.____
5. “I work eight hours a day, except when the children are on holiday” said Mrs. Wood
Mrs. Wood said me that he worked eight hours a day, excepted when the children were on holiday
6. “You’ve been making good progress this semester” Miss Lynn told me
Miss Lynn said that _____I had been making good progress that semester_________
7. “If you bought all the tickets, you would win the lottery” the man said
The man told me ______that If I had bought all the tickets, I would win the lottery______________
8. “I like swimming but I don’t go very often” Jill said to Pam
Jill said that ______he liked swimming but he didn’t go very often___________________________
9. “I want to buy it, but I haven’t brought any money” said Patrick
Patrick told me _________that he wanted to buy it, but he hadn’t brought any money_______________________
10. “I’m going to visit my aunt in Hue, but I’m not sure when” said Mai
Mai told me _________that she was going to visit her aunt in Hue, but she was not sure when__________________
PA
1
17 tháng 7 2021
1) Áp dụng định lí Pytago vào ΔABC vuông tại A, ta được:
\(BC^2=AB^2+AC^2\)
\(\Leftrightarrow BC^2=6^2+8^2=100\)
hay BC=10(cm)
Áp dụng hệ thức lượng trong tam giác vuông vào ΔABC vuông tại A có AH là đường cao ứng với cạnh huyền BC, ta được:
\(AH\cdot BC=AB\cdot AC\)
\(\Leftrightarrow AH\cdot10=6\cdot8=48\)
hay AH=4,8(cm)
Bat Trang, traditional porcelain and pottery village with history of seven centuries, is an interesting attraction in Hanoi that tourists should not ignore.
Bat Trang, the seven-century old pottery village, is an interesting attraction in Hanoi that tourists should not ignore.
History
Located in an area rich in clay, the village has advantage of ingredients to create fine ceramics. Moreover, lying besides the Red river, between Thang Long and Pho Hien, two ancient trade centers in the north of Vietnam during 15th-17th century, Bat Trang’s ceramics were favorite products not only in domestic market, but also foreign ones thanks to Japan, Chinese and Western trading boats that passed by.
In the18th and 19th century, due to restricting foreign trade policy of Trinh, Nguyen dynasty, it was difficult for pottery products in Vietnam to be exported to foreign countries, and some famous pottery making villages like Bat Trang, or Chu Dau ( Hai Duong province) went through a hard time. Since 1986, thanks to economic reforms and development, more attention has been vested in the village and the world gets a chance to know more about Vietnamese porcelain through many high quality exported Bat Trang’s ceramic products.
Products
Bat Trang ceramics are produced for daily household use (bow, cup, plates, pot, bottle…), worshipping, or decoration purposes. Nowadays, the pottery artists bring into ceramics many innovations in production techniques, and creativity in products’ features, hence many new products have been born, and even daily household items may have the beauty like decoration ones.
Activity
Visiting Bat Trang, tourists can take a walk or join a buffalo tour for sightseeing and shopping. Besides many ceramic stores along the road in the village, tourists should visit Bat Trang Porcelain and Pottery Market where they can directly make pottery products by themselves. Many youngsters and foreign tourists are interested in in this pottery- making experience, and spend a whole day in the market to make a gift for family or friends.
Location
Bat Trang belongs to Gia lam district of Hanoi. You can catch the bus 47 (Long Bien- Bat Trang) that stop just a few steps from Dong Xuan market with the end terminal in Bat Trang. The bus runs every 20 minutes. You can also ride a motorbike from the center of Hanoi to Bat Trang ( 20 minutes) – rent one or ask a Xe Om to take you there!