\(\begin{array}{l}\quad x(x^2 + 1)dx - (x+1)ydy = 0\\\Leftrightarrow ydy = \dfrac{x^3+x}{x+1}dx\\\Leftrightarrow \displaystyle\int ydy = \displaystyle\int\dfrac{x^3+x}{x+1}dx\\\Leftrightarrow \dfrac{y^2}{2} = \dfrac{x^3}{3} - \dfrac{x^2}{2} + 2x - 2\ln(x+1) + C\\\Leftrightarrow y = \pm \sqrt{\dfrac{2x^3}{3} - x^2 + 4x - 4\ln(x+1) + C'}\end{array}\)
Giúp mình 3 câu trong bài 3 này. Cảm ơn rất nhiều
Hoà tan hoàn toàn 3,2 gam Cu trong dung dịch HNO3 , sau phản ứng thu được 896ml khí X gồm NO và NO2 (đktc). Tính phần trăm theo khối lượng mỗi chất trong X GIÚP EM VỚI Ạ !!! EM CẦN GẤPPPPPP
Vẽ biểu tượng doodle của google hôm nay, nếu không biết thì nhìn vào ảnh. ( có tô màu, 1 bức ký, 1 bức không )
Ko cần giải thích đâu nha, mng trả lời đúng và nhanh là đc ạ. 1. I told my teacher that I _________ what she said. did not believe was not believing 2. I ________ the number 12 bus just down the road. could see was seeing 3. At the moment Maria ________ her homework, as she does every day. does is doing 4. The baby ________ 21 inches long. measures is measuring 5. Please be quiet. I ________ to the radio. listen am listening 6. Everything on the menu ________ delicious. tastes is tasting 7. Why ________ so selfish about this? are you are you being 8. Was he on time or was he ________ ? late being late 9. He told the police he'd only had a small drink and was ________ not to drive too fast. careful being careful 10. Is she always ________ with children and animals? so patient being so patient
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Giải giúp em với ạ. Em đang cần gấp. Em cảm ơn
Giúp e bài này với ạ Eim cảm ơn trước Làm lại hết ak
1. If/freeze/solid./water,/it/becomes/you. 2. If/tomorrow,/it/car./rains/I'll/the/take 3. cinema/If/I/often/lived/closer/to/the/I/go/more./would 4. night./If/I/much/drink/too/coffee,/at/sleep/I/can't 5. Ice/it./heat/melts/if/you Giúp mình nha mọi người
ko cần giải thích, nhanh và đúng là đc 1. Have you ______________ your lost dog yet? find found 2. She spoke too softly. I couldn't ______________ her. hear heard 3. But we heard everything she ______________ . say said 4. We went shopping and I ______________ a new pair of jeans. buy bought 5. Did you ______________ well last night? sleep slept 6. I used to ______________ a lot of money, but I don't make much now. make made 7. We were really surprised when we ______________ the game. win won 8. We thought we would ______________ for sure. lose lost 9. Have you ever ______________ a movie star? meet met 10. Mum taught our sisters how to cook, but she didn't ______________ us. teach taught
Một cửa hàng định bán một chiếc điện thoại với giá 6 500000 đồng. Nhưng để tri ân khách hàng đã giảm giá 12%, tuy vậy vẫn lãi 4% so với vốn. Hỏi giá vốn là bao nhiêu
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