Đáp án:
Giải thích các bước giải:
`\frac{a}{3}<\frac{2}{3}`
`⇔ \frac{a}{3}-\frac{2}{3}<0\ (1)`
`⇔ \frac{a-2}{3}<0`
Ta có: `3>0` (lđ)
Để có ĐK `(1)`
`⇒ a-2 < 0`
`⇔ a<2`
Mà `a \in \mathbb{N^{**}}`
`⇒ a=1`
Vậy `a=1`
ae ơi giúp tôi với .............. á á á ............... heo - me
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Cá bạn làm cho mik hai bài thơ nhé Nl : các bạn toi ơi có lây đi
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21. Mr.Jones, ______I was working, was generous about overtime payments. A. he B. for whom C. for him D. whom 22. Is this the address to ____________ you want the package sent ? A. where B. which C. that D. whom 23. London is the city ________I have visited several times. A. in which B. where C. in that D. which 24. One of the girls________in that company caused an accident A. worked B. who worked C. whom worked D. whose worked 25. The computer, _____ hard disk has just been upgraded, is among the latest generations. A. that B. whose C. of which D.which of 26. The girl ________me this gift is my best friend. A. presented B. was presenting C. presenting D. be presenting Teacher: Thanh Huyen Le 0986.08.05.88 27. He lent me many picture-books, most of________I had read. A. whom B. who C. whose D. which 28. Don't drink too much beer, ________will make us fat. A. which B. when C. who D. whom 29. The friend to ________ he was talking on the phone is English. A. who B. whose C. whom D. which 30. Why do you always believe in everything________ he says? A. who B. which C. when D.that 31. There are a lot of people at my friend's wedding party, only a few of ________I had met before. A. who B. whose C. whom D. which 32. Aberdeen, ________ my brother lives, is a town in Scotland. A. where B. which C. who D. when 33. My parents live in the same house ________ they bought 50 years ago. A. that B. which C. where D. A and C 34. August is the month______I always give my birthday parties. A. which B. in which C. what D. why 35. The people to_______she was speaking didn't know German. A. who B. whose C. that D. whom 36. Sunday is the day _________ most of the Christians usually go to church. A. in which B. when C. that D. at which 37. Joyce Bews,________ was born and grew up in Portsmouth on the south coast of England, ________she still lives, was 100 last year. A. that / in which B. who / where C. that / where D. whom / where 38. According to the research, the time at______ most road accidents happen is early evening. A. when B. which C. whose D. that 39. The girls and the flowers _____he painted were vivid. A. who B. which C. whose D. that 40. We go to school regularly,__________________ . A. that makes our teacher happy B. which makes our teacher happily C. it makes our teacher happy D. which makes our teacher happy 41. The letter _________ grandma was kept carefully in a box. A. you wrote B. which you wrote to C. to whom wrote D. which wrote 42. Sue lives in the house. The house is opposite my house. A. Sue lives in the house which is opposite my house. B. Sue lives in the house who is opposite my house. C. Sue lives in the house where is opposite my house. D. Sue lives in the house and which is opposite my house 43. Computers cannot operate without the programmes,________ are often called software. A. which B. that C. in which D. which
Giúp em với ạ do em mới lên lớp 7 í
EXERCISE IX: Choose the best answer 1. I have two sisters ________________are doctors. A. both of which B. who both C. both of whom D. whom both 2. Do you remember the day ? I first met you on that day. A. Do you remember the day where I first met you ? B. Do you remember the day when I first meet you ? C. Do you remember the day on which I first met you ? D. B and C are correct. 3. Mexico City ,________ is the fastest growing city in the world , has a population of over 10 million. A. what B. which C. that D. where 4. We visited the church _____________ in the 18th century. A. was built B. which built C. building D. which was built 5. Ms Young, to ______ many of her students are writing, is living happily and peacefully in Canada. A. who B. whom C. that D. whose 6. She is the woman ____________ sister looks after the baby for us. A. who B. whom C. that D. whose 7. Mr Smith, ______is a retired teacher, does volunteer work at the hospital. A. that B. whom C. who D. is 8. I want to know the reason________ he told you last night. Teacher: Thanh Huyen Le 0986.08.05.88 A. Why B. which C. where D. when 10. I like the teacher. I learnt English with her in high school. A.I like the teacher with whom I learnt English in high school. B. I like the teacher whom I learnt English with in high school. C.I like the teacher that I learnt English with in high school. D.all are correct. 11.The banker to________ I gave my check was quite friendly. A. who B. that C. whom D. which 12.All of us are waiting for the man ___________ son was lost. A. who B. which C. whom D. whose 13.The girl ______ is our neighbor. A. talks to the lady over there C. was talking to the lady over there B. is talking to the lady over there D. talking to the lady over there 14. My computer, _________ mouse doesn't work, cannot be used now. A. while B. because C. whose D. which 15. What’s the name of the man_________car you borrowed? A. who B. which C. that D. whose 16. The young woman who lives next door is very kind to my family. A.The young woman to live next door is very kind to my family. B.The young woman he lives next door is very kind to my family. C.The young woman living next door is very kind to my family. D.The young woman lived next door is very kind to my family. 17. She didn’t tell me the reason _______ she came late. A. when B. for which C. why D.both B and C 18. This is the best play ________ I have ever seen. A. which B. what C. whom D. that 19. I know a nearby restaurant _____ has seafood. A. that B. who C. where D. whose 20. Taj Mahal, _____ by Shah Janhan for his wife, is thought to be one of the great architectural wonders of the world. A. being built B. was built C.which was built D.been built
Tìm x y z biết a) x/12 = y/3 và x - y = 96 b) 7x = 3y và x - y = 16 c) 2x = 3y = 6z và x + y + z = 180 d) x/2 = y/3; y/5 = z/4 và x-y+z = 21
Cho hàm số y= ln ( ax ) , a > 0 , x > 0 a. ( CLO1.1 ) Tính đạo hàm cấp 3 của hàm số b. Dự đoán đạo hàm cấp n của hàm số và dùng quy nạp toán học để chứng minh dự đoán đó đúng
EXERCISE VII: Fill in the gap with: WHO, WHOM, WHICH, or WHOSE: 1. We talk about the party ____________Sarah wants to organize for my birthday. 2. Don is a friend with ____________ I stayed in Australia. 3. Mrs. Richmond, ____________is 42 years old, does morning exercise every morning. 4. We cannot find the person____________car is blocking our driveway. 5. The film about____________they are talking is thrilling. 6. My uncle, ____________you met yesterday, is a famous lawyer in the town. 7. The police are questioning the woman____________purse was stolen outside the supermarket. 8. The girl ____________showed me the way to your house has a beautiful oval face. 9. The book ____________I received on my birthday is informative. 10. The company ____________products have high quality is facing with financial problem. EXERCISE VIII: CHOOSE THE BEST ANSWER: 1. That’s my friend,_______________ comes from Japan. A. which B. who C. whom D. where. 2. The plants which______________ in the living room need a lot of water. A. are B. be C. is D. was 3. She’s the woman_______________ sister looks after the baby for us. A. who B. which C. that’s D. whose 4. That’s the doctor for________________ Cliff works. A. that B. which C. whom D. whose 5. Marie,______________ I met at the party, called me last night. A. that B. whom C. which D. whose 6. I remember Alice,______________ rode the bus to school with. A. I B. whom I C. which I D. who 7. I used to enjoy the summer, ______________ we had a big family picnic. A. where B. when C. which D. that 8. Tell me about the city ______________ you grew up. A. that B. where C. which D. ø 9. Anna found the book that ________________ wanted at the bookshop. A. ø B. where C. she D. which 10. Please remember to take back to the library all the books ________ are due this week. A. ø B. that C. when D. they Teacher: Thanh Huyen Le 0986.08.05.88 11. He likes the dress. Huong is wearing it A. He likes the dress which Huong is wearing it B. He likes the dress Huong is wearing it C. He likes the dress who Huong is wearing D. He likes the dress Huong is wearing 12. Most of the classmates couldn't come. He invited them to the birthday party A. Most of the classmates he invited to the birthday party couldn't come. B. Most of the classmates he was invited to the birthday party couldn't come. C. Most of the classmates that he invited them to the birthday party couldn't come. D. Most of the classmates which he invited to the birthday party couldn't come. 13. What was the name of the man? You met and talked to him this morning. A. What was the name of the man who you met and talked to him this morning? B. What was the name of the man you met and talked to this morning? C. What was the name of the man you met and talked to whom this morning? D. What was the name of the man whose you met and talked to this morning? 14. The church is over 500 years old. Our class visited it last summer. A. The church which our class visited it last summer is over 500 years old. B. The church that our class visited it last summer is over 500 years old. C. The church which our class visited last summer is over 500 years old. D. The church our class visit last summer is over 500 years old. 15. The song says about the love of two young stdents. She is singing the song. A. The song which she is singing it says about the love of two young stdents. B. The song she is singing says about the love of two young stdents. C. The song says about the love of two young stdents which she is singing. D. The song says about the love of two young stdents that she is singing it.
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