Đáp án:
B
Giải thích các bước giải:
3.
\[f'\left( x \right) = 0 \Leftrightarrow \left[ \begin{array}{l}x = - 1\\{x_1} = {x_2} = 2\\x = 3\end{array} \right.\]
Do $(x-2)^2$ là bậc chẵn nên f'(x) không đổi dấu qua x=2
nên hàm số f(x)=0 có 2 cực trị
ơ 3 điểm cực trị vì 2 no đơn 1 no chẵn suy ra 2 cực trị
Vẽ giúp mình một cái bánh trung thu bị cắt nửa, nhân thì theo sở thích của mn, `\text{~Chúc mọi người trung thu zui zẻ~}`
Cu ( đồng ) có phải là phân tử không?
Giúp mk vs ah, mk cảm ơn nhiều! 20. Ngoc is friendly. We are talking about her. • A. Ngoc, we are talking about, is friendly. • B. Ngoc, about her we are talking, is friendly. • C. Ngoc, whom we are talking about is friendly. • D. Ngoc, about whom we are talking, is friendly. 21.He started learning French six years ago. A.He has learned French for six years. B.It was six years ago did he start learning French. C.He hasn’t learnt French for six years. D.It is six years since he has learnt French. 22.People believed he won a lot of money on the lottery. A.He is believed that he won a lot of money on the lottery. B.He won a lot of money on the lottery, it is believed. C. He is believed to have won a lot of money on the lottery. D.He was believed to win a lot of money on the lottery. 23.She was too weak to lift the basket. A.Although she was weak, she could lift the basket. B.She shouldn't have lifted the basket because she was so weak. C.She was so weak that she couldn't lift the basket. D.The woman lifted the basket, so she wasn't very weak. 24..The last time I went to the museum was a year ago. A.I have not been to the museum for a year. B.A year ago, I often went to the museum. C.My going to the museum lasted a year. D.At last I went to the museum after a year 25.This is the first time I have ever attended such an enjoyable wedding party . A.The first wedding party I attended was enjoyable. B. had the first enjoyable wedding party. C.My attendance at the first wedding party was enjoyable.. D.I have never attended such an enjoyable wedding party before. 26.The coffee was not strong. It didn’t keep us awake A.The coffee was very strong, but it couldn’t keep us awake B.We were kept awake because the coffee was strong C.The coffee was not strong enough to keep us awake D.The coffee was so hot that it didn’t keep us awake 27.“Why don’t you put a better lock on the door?" said John. A.John suggested to put a better lock on the door. B.John asked why not putting a better lock on the door. C.John suggested putting a better lock on the door. D.John made us put a better lock on the door. 28.Nobody told me that George was ill. A.I wasn’t told that George was ill. B. I was told that George wasn’t ill. C. George wasn’t told to be ill. D. George was told not to be ill. 29.“Would you like to stay for dinner?” she asked me. A.She asked me if I liked to stay for dinner. B.She invited me to stay for dinner. C.She offered me dinner. D.She was very kind to offer me dinner. 30.“If I were you, I would go. ” he said. A. He advised me to go B. He told me to stay with him. C. He asked me not to go. D. He advised me not to go.
Bài ca dao trên có đc xem là văn bản không? Vì sao? Mục đích của bài ca dao trên? Văn bản trên thuộc PCNN nào?
tính 2 3/13 x 27/58 x 2 15/24 x 8/21 : 3/7 = ................................................................................................................ =................................................................................................................. =.................................................................................................................
2. Work in pairs. Discuss the questions. • How are the basic needs met in your life? • How many of the things you own do you really need? • How many of the things you buy are necessary? 3. Work in pairs. Think about the questions. Then tell your partner. • What did you want so much it became a need? • Did you go ahead and get it? • If not, what stopped you? If you did buy it, how did you feel later? • Did you enjoy it? Why? Why not?
ý nghĩa của câu văn "Mẹ sẽ đưa con đến trường, cầm tay con dắt qua cánh cổng, rồi buông tay mà nói: đi đi con, hãy can đảm lên, thế giới này là của con, bước qua cánh cổng trường".
mn giúp mik nhanh với ạ mik cần gấp
Giúp mk vs ah, mk cảm ơn nhiều! 10. Tom had broken a vase. • A. A vase was broken by Tom. B. A vase had been broken by Tom. • C. A vase was broke by Tom. D. Tom broke the vase.. 12. She has been studying at this school for three years. • A. She started studying at this school three years ago. • B. She started to study at this school three years ago. • C. She started to study at this school three years ago. • D. A & C are correct. 13. I usually listen to pop music. I like it very much. • A. I’m very fond of listening to pop music. B. I’m very fond listening to pop music. • C. I’m very fond of listen to pop music. D. A & C are correct. 14. He spent two hours repairing my motorbike. • A. It took him two hours to repairing my motorbike. • B. It took him two hours repairing my motorbike. • C. It took him two hours to repair my motorbike. • D. It took him two hours repair my motorbike. 15. They didn’t allow us to smoke in here. • A. They didn’t let us to smoke in here. B. They let us to smoke in here. • C. They didn’t let us smoke in here. D. They didn’t permit us smoke in here. 16. Learning English is necessary. • A. It is necessary learning English. B. It is necessary to learn English. • C. It is necessary learnring English. D. It is necessary to learnring English. 17. He isn’t old enough to ride a motorbike. • A. He is too young to ride a motorbike. B. He is too young ride a motorbike. • C. He is young to ride a motorbike. D. He is too young riding a motorbike. 18. He expects to hear from her as soon as possible. • A. He is looking forward to hear from her as soon as possible. • B. He is looking forward to hearing from her as soon as possible. • C. He is looking forward hear from her as soon as possible. • D. He is looking forward hearing from her as soon as possible. 19. The man is my teacher. I am grateful to him. • A. The man whom I grateful to him is my teacher • B. The man is my teacher who I am grateful. • C. The man whom I am grateful to is my teacher. • D. The man to him I am grateful is my teacher.
một gia đình có 2 vợ chồng , bình quân thu nhập hàng tháng là 2 800 000 đồng mỗi người .Nếu gia đình đó có thêm 2 con nữa mà tổng thu nhập hàng tháng không thay đổi thì bình quân thu nhập hàng tháng của mỗi người là bao nhiêu ?
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