Xét tính đơn điệu y= $\frac{x^{2}-2x+3}{x+1}$

Cho tam giác ABC vuông tại A, đường cao AH (H ∈ BC). Có AH=3 cm, HB=2 cm. Tính HC, AC?

Giúp mình với plssss ,bài này rất qutrong với mình mình hứa tick 5 sao và ctrhn cho ai trl đầu tiên

Các bạn giúp mình câu 3 với ạ !

vẽ mầm NL : tôi nghe xong câu nói : dịch xịn hơn là đc hay nhất tôi trầm karm và suy tư câu nói ấy cho 1 khoảng thời gian ngắn ( khoảng 10 giây ) và tôi nghĩ lại : thế thì mk gt chi tiết làm cái gì cho mệt ?

cô chữa bài này nhưng em ko hiểu , có thể giải thích giùm em tại sao điền vậy đc ko ah ?

1.(2x-y)^2 2.(x+4y)^2 3.4x^2-9y^2 4.27x^3-8 5.(x+2y)^3 6.(3x-7)^3 7.8x^3+27 7 hang dang thuc

dũng có 1 số bi , Hùng cho dũng thêm 1 số bi dũng có . Hỏi số bi dũng có trước đây bằng một phần mấy số bi dũng hiện có ? Làm nhanh giúp với ạ

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____________ is waste material or unwanted thing that you throw a way, for example, an old plastic bottle, spoiled food from a kitchen. (0.5 Points) Garbage Biodegradable Water pollution An oil spill 2It lives in the sea. I'm frightened of it! It sounds like "park". (0.5 Points) It is a whale. It is a shark. It is an octopus. It is a crab. 3This big animal lives in the sea and on land or ice. It has two big round eyes. What is it? (0.5 Points) It is a shark It is an octopus. It is a whale. It is a seal. 4It has eight arms and lives in the ocean. What animal is it? (0.5 Points) It's a shark. It's a sea horse. It’s an octopus. It's a jelly fish. 5It is a grey sea animal. It can swim very fast and jump very high. It is also friendly. (0.5 Points) It’s a crab. It’s a dolphin. It’s a sea turtle. It’s a shark. 6Will we ______________ water pollution in the future? Yes, we will. (0.5 Points) stopped stopping stops stop 7To protect the environment, we ................................. pick up our trash before we go. (0.5 Points) doesn't has to can't must 8There is too much pollution. The fish ................................... live here. (0.5 Points) must have to can't should 9We ..................................... cut down the forests. We need to protect the animals. (0.5 Points) have to must can't can 10We ..................................... the oceans to make a better world. (0.5 Points) throw destroy protect pollute 11Complete the sentence. Use "will" or "won't". Plastic bags ______________ disappear. They will stay for a long time. (Fill in ONE missing word) (0.5 Points) Enter your answer 12Look at the picture. Use "mustn't" or "must". You ............................ walk on the grass or pick up the flowers. (Fill in ONE missing word) (0.5 Points) Enter your answer 13Look at the picture. Use "mustn't" or "can". Students .................................... use their phones in classrooms. (Fill in ONE missing word) (0.5 Points) Enter your answer 14Complete the sentence. Use "will" or "won't". I am hungry. But I ___________ eat anything, because we are having dinner soon. (Fill in ONE missing word) (0.5 Points) Enter your answer 15Complete the sentence. Use "will" or "won't". Don't worry. I ____________ send you an email soon. (Fill in ONE missing word) (0.5 Points) Enter your answer 16Complete the sentence. Use "Will" or "Won't". _______ Billy spend all his money on a new game? No, he won't. (Fill in ONE missing word) (0.5 Points) Enter your answer 17Use "must" or "have to". You ..................................... bring a passport when you travel to the USA. (Fill in ONE missing word) (0.5 Points) Enter your answer 18Use "will" or "won't". I don't think it ..................... rain tomorrow. (Fill in ONE missing word) (0.5 Points) Enter your answer 19This is a kind of small fish. It has a head like that of a horse. It is a ............................ (Fill in ONE missing word) (0.5 Points) Enter your answer 20An accident ship can cause an oil __________. (Fill in ONE missing word) Immersive Reader (0.5 Points)