hàm số y=x^3-6x^2+3mx+5 đồng biến trên R khi tham số m thỏa điều kiện làm dùm mình câu này

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“Có câu chuyện kể rằng, một đôi vợ chồng trẻ vừa dọn đến ở trong một khu phố mới. Sáng hôm sau, vào lúc hai vợ chồng ăn điểm tâm, người vợ thấy bà hàng xóm giăng tấm vải trên giàn phơi. “Tấm vải bẩn thật” - Cô vợ thốt lên. “Bà ấy không biết giặt, có lẽ bà ấy cần một loại xà phòng mới thì giặt sẽ sạch hơn”. Người chồng nhìn cảnh ấy nhưng vẫn lặng im. Thế là, vẫn cứ lời bình phẩm ấy thốt ra từ miệng cô vợ mỗi ngày, sau khi nhìn thấy bà hàng xóm phơi đồ trong sân. Một tháng sau, vào một buổi sáng, người vợ ngạc nhiên vì thấy tấm vải của bà hàng xóm rất sạch, nên cô nói với chồng: “Anh nhìn kìa! Bây giờ bà ấy đã biết cách giặt tấm vải rồi. Ai đã dạy bà ấy thế nhỉ?” Người chồng đáp: “Không. Sáng nay anh dậy sớm và đã lau kính cửa sổ nhà mình đấy”. Thực ra mỗi người trong chúng ta, ai cũng đều giống như cô vợ trong câu chuyện kia. Chúng ta đang nhìn đời, nhìn người qua lăng kính loang lổ những vệt màu của cảm xúc, bám dày lớp bụi bặm của thành kiến và những kinh nghiệm thương đau. Chúng ta trở nên phán xét, bực dọc và bất an trước những gì mà tự mình cho là “lỗi lầm của người khác”. Một điều dễ nhận diện là khi tâm trạng vui vẻ, chúng ta nhìn ai cũng thấy dễ chịu, gặp chuyện gì cũng dễ thứ tha. Chúng ta có thể mỉm cười trước những trò nghịch ngợm của lũ trẻ, đủ khoan thứ để nhẫn nại một lời nói khó nghe, những chuyện tưởng chừng khó chấp nhận, thì chúng ta cũng dễ dàng thỏa hiệp. Những lúc ấy, dường như cả thế giới đều trở nên hòa ái, mọi chuyện trôi qua một cách nhẹ nhàng. Vậy mà, chỉ cần một chút lo lắng dâng lên trong lòng, những muộn phiền về quá khứ, nỗi sợ hãi về tương lai sẽ lập tức khiến cho cái thế giới vốn đang đẹp đẽ nhường kia liền biến thành một chốn đầy những chuyện xấu xa, phiền phức. Khi ấy những tiếng hò hét cười đùa của lũ trẻ sẽ trở thành những âm thanh khó chịu, một lời nói không vừa ý dễ dàng khiến cho ta sân giận hoặc tổn thương, những chuyện nhỏ mà lúc bình thường không đáng bận tâm, bỗng trở thành một nỗi phiền não quá sức chịu đựng.” [...] (Dẫn theo Thảo Yukimoon, Luôn nhìn thấy lỗi ở người khác: Nỗi bất hạnh lớn lao của những cái đầu chứa đầy thành kiến, http://kenhl4.vn) Câu 1. Nêu phương thức biểu đạt chính của văn bản trên? Câu 2. Vì sao người vợ lại bình phẩm về việc giặt vải của người hàng xóm, khi thực tế điều đó không liên quan đến cô ta? Câu 3. Anh/Chị hiểu thế nào là thành kiến? Thành kiến là tích cực hay tiêu cực? Nêu một ví dụ thực tế về thành kiến trong xã hội ngày nay. Câu 4. Anh/Chị có đồng ý với quan niệm “Một điều dễ nhận diện là khi tâm trạng vui vẻ, chúng ta nhìn ai cũng thấy dễ chịu, gặp chuyện gì cũng dễ thứ tha ” không? (trình bày trong 5 -7 câu)

36 Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Recently, we made a trip to visit Dong Ho village with a desire to meet the old artisan - Nguyen Huu Sam. Just when we arrived at the dyke in the village and talked with the villagers about the artisan, they intimately told us about him. The old house owned by the artisan is situated in a long alley of the village. On the walls of the house there are many folk paintings in different genres, from daily life paintings to landscape paintings shown in a set of “four seasons” and four times. Mr. Sam told us about his past. When he was three years old, he was instructed in the craft of making Dong Ho paintings by his father. At five, he could help his father apply the Dong Ho paintings, and learn how to print the paper with proper colours.At seven, he was able to draw with a pen and make the most difficult samples. Years went by and the soul of Dong Ho folk paintings has kept seashell powder paint to the poonah-paper. In the 1940s, this craft flourished. At that time, he was assigned by his parents to take the paintings to the market for sale. Mr. Sam said that 17 families in the village had been engaged in making Dong Ho paintings. Artisan Sam has always been devoted to the making of Dong Ho paintings and has waited for opportunities to restore this traditional craft. In 1967, when the local authorities assigned him to restore the traditional genre of Dong Ho folk paintings, he gathered 50 villagers with professional skills and collected hundreds of woodblocks to establish the Dong Ho Painting Cooperative. Thanks to his efforts, such famous paintings as "Rat’s wedding”, “Rooster”, “Scene of jealousy” and “Writing verses about precious flowers” have been revived. Dong Ho paintings have been available in many parts of the world such as Japan, France, Germany, Singapore and the United States. The themes of Dong Ho paintings are about ________. A: various aspects of life B: animals and flowers C: landscapes D: weddings 37 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: _____________ she’s young, she’s the most famous artisan in the village. A: Whereas B: When C: Although D: In order to 38 Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits blank (28). We went to Doi Tam, a village famous (25)______ its drum making techniques, in Ha Nam Province last month. The craft was first introduced to the village sometime in the 8th or 9th century. Today there are more than six hundred drum makers living in Doi Tam village. #x200eI was amazed to see big drums in front of every house in the village. People say that it (26)______ four workers three days to make a drum with a diameter of 1.5 metres. To make a drum, the craftsmen have to follow an eight-stage process. Stretching the drumhead is the most challenging stage (27)_______ they have to carefully assess the sound it makes. The other steps do not require such high skills. #x200eNowadays, Doi Tam drums are not only famous in Viet Nam but are also (28)_______ to other countries such as Laos, Cambodia, Japan, and the USA. A: be sold B: selling C: sold D: sell 39 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: They keep changing the decoration of the shop ________ they can attract more young people. A: so that B: when C: although D: because 40 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: The people in my village cannot earn money for their daily life. They can’t _____________ this traditional craft. They have to find other jobs. A: live on B: work on C: set up D: help out

32 Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Recently, we made a trip to visit Dong Ho village with a desire to meet the old artisan - Nguyen Huu Sam. Just when we arrived at the dyke in the village and talked with the villagers about the artisan, they intimately told us about him. The old house owned by the artisan is situated in a long alley of the village. On the walls of the house there are many folk paintings in different genres, from daily life paintings to landscape paintings shown in a set of “four seasons” and four times. Mr. Sam told us about his past. When he was three years old, he was instructed in the craft of making Dong Ho paintings by his father. At five, he could help his father apply the Dong Ho paintings, and learn how to print the paper with proper colours.At seven, he was able to draw with a pen and make the most difficult samples. Years went by and the soul of Dong Ho folk paintings has kept seashell powder paint to the poonah-paper. In the 1940s, this craft flourished. At that time, he was assigned by his parents to take the paintings to the market for sale. Mr. Sam said that 17 families in the village had been engaged in making Dong Ho paintings. Artisan Sam has always been devoted to the making of Dong Ho paintings and has waited for opportunities to restore this traditional craft. In 1967, when the local authorities assigned him to restore the traditional genre of Dong Ho folk paintings, he gathered 50 villagers with professional skills and collected hundreds of woodblocks to establish the Dong Ho Painting Cooperative. Thanks to his efforts, such famous paintings as "Rat’s wedding”, “Rooster”, “Scene of jealousy” and “Writing verses about precious flowers” have been revived. Dong Ho paintings have been available in many parts of the world such as Japan, France, Germany, Singapore and the United States. When Mr. Sam was very young, he mostly helped his parents by ________. A: applying the woodblocks with proper paints and pressing them on sheets of paper B: drawing with a pen and using proper paints to make many copies of paintings C: applying seashell powder to make various paints for painting making D: collecting and taking the paintings to the market for sale 33 Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. The artisan moulded the copper to make a bronze drum. A: The artisan moulded the copper because they want make a bronze drum. B: The artisan moulded the copper so that they could make a bronze drum. C: The artisan moulded the copper so that they can make a bronze drum. D: The artisan moulded the copper because of they wanted make a bronze drum. 34 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: Do you know who’s _____________ his pottery workshop? A: passing down B: bringing out C: taking over D: turning down 35 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: All the main parts of this machine are ___________ of steel. A: made B: given C: done D: woven ,

27 Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. When she was a student, she did not have a good relationship with her classmates. A: When she was a student, she got on well her classmates. B: When she was a student, she got on with her classmates. C: When she was a student, she didn’t get on well her classmates. D: When she was a student, she didn’t get on well with her classmates. 28 Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given. Last weekend/ I/ go/ Van Phuc village/ buy/ nice/ silk scarf/ mother. A: Last week I went to Van Phuc village to buy nice silk scarf for my mother. B: Last week I went to Van Phuc village to buy nice silk scarf to my mother. C: Last week I went to Van Phuc village and buy a nice silk scarf to my mother. D: Last week I went to Van Phuc village and bought a nice silk scarf for my mother. 29 Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions . A: cognitive B: frustrated C: fabulous D: confident 30 Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions . A: luxury B: cultural C: pollution D: drumhead 31 Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits blank (27). We went to Doi Tam, a village famous (25)______ its drum making techniques, in Ha Nam Province last month. The craft was first introduced to the village sometime in the 8th or 9th century. Today there are more than six hundred drum makers living in Doi Tam village. #x200eI was amazed to see big drums in front of every house in the village. People say that it (26)______ four workers three days to make a drum with a diameter of 1.5 metres. To make a drum, the craftsmen have to follow an eight-stage process. Stretching the drumhead is the most challenging stage (27)_______ they have to carefully assess the sound it makes. The other steps do not require such high skills. #x200eNowadays, Doi Tam drums are not only famous in Viet Nam but are also (28)_______ to other countries such as Laos, Cambodia, Japan, and the USA. A: although B: so C: since D: but

17 Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given. In/ past/ most/ girls/ like/ knit/ sweaters/ themselves. A: In the past most girls like to knit sweaters for themselves. B: In the past most girls liked knitting sweaters for themselves. C: In the past most girls liked to knitting sweaters for themselves. D: In the past most girls like knitting sweaters for themselves. 18 Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A: tense B: stressed C: concentrate D: self-aware 19 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: She is very good at knitting. She __________ herself this sweater. It looks very nice. A: knits B: knitted C: is knitting D: knit 20 Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. The children are eager to visit Hue next week. A: The children are looking up to visiting Hue next week. B: The children are looking forward to visit Hue next week. C: The children are looking up to visit Hue next week. D: The children are looking forward to visiting Hue next week. 21 Mark the letter A, B, C or D on your answer sheet to indicate the meaningful sentence from the cues given. These/ baskets/ make/ thin/ bamboo/ strips. A: These baskets were made in thin bamboo strips. B: These baskets are made with thin bamboo strips. C: These baskets are made of thin bamboo strips. D: These baskets were made by thin bamboo strips. 22 Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. . A: I’d like to try this conical hat, please. B: _____________ A: It’s not very expensive. B: It takes time to make it. C: This can be a souvenir. D: Sure. Put it on. 23 Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A: decision B: helpline C: advice D: delighted 24 Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions . A: friendship B: encourage C: medicine D: graduate 25 Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. . A: What a beautiful painting! – B: ______________ A: I bought it in a souvenir shop. B: You’re welcome. C: I’m glad to tell you so. D: I don’t mind if you say that. 26 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: Since changing the way of production, many craftsmen have voluntarily joined together to for ___________ . A: cooperatives B: cooperative C: cooperates D: cooperation