xét tính đơn điệu của hàm số y= -x+$\sqrt[]{x^2+8}$ y=x$\sqrt[]{3-x}$ y= $x^{2}$$\sqrt[]{x-2}$

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COMPARATIVE ADJ (SO SÁNH HƠN) I. Complete sentences, using the comparison of adj: 1. A new house is ________________ an old house.(expensive) 2. Motorbikes are _____________________ bikes.(fast) 3. My television is _________________________ his television.(modern) 4. Summer is ________________________ spring. (hot) 5. Jane is __________________________ her sister. (beautiful) 6. Skirts are ______________________ dresses. (cheap) 7. Her English is ________________________ my English. (good) 8. A bike is __________________________ a car. (convenient) 9 . My sister is ..............................................(good) looking than I am. 10. A book is ...............................................................(wonderful) than a comic. 11. Nina walks .....................................................(slow) than her father. 12. She is ..................................................................(happy) than I am. 13. This bike is...............................................(cheap) than mine. 14. This house is much .................................................(comfortable) than that one. 15. A dog is ..............................................( heavy) than a cat. 16. My pencil is............................................ (long) than yours. 17. New teacher is .................................................. ( nice) than old one. 18. Ho Chi Minh is......................................................(large) than Bien Hoa. II. Use comparative adj in these sentences Ex: Hue / small / Hanoi -> Hue is smaller than Hanoi. 1- My school / big / your school .......................................................................... 2- Lan / young / Hoa. ...................................................................... 3- My father / old / my mother. ........................................................................... 4- This ruler / long / that ruler. ............................................................................ 5- This room / large / my room ............................................................................ 6- The boys / strong / the girls. ............................................................................ 7- My house / tall / your house. ............................................................................. 8- Nam / short / his sister. ..............................................................................