Cho Δ ABC. Vẽ BH ⊥ AC. Gọi M là trung điểm của BC. Tia AM cắt BH ≡ E. Trên tia AM lấy điểm F sao cho: M là trung điểm EF. Chứng minh: FC ⊥ AC.

giúp mình nha bài đường trung bình của tam giác

Cho hình bình hành a b c d và một điểm M tùy ý chứng minh rằng vecto MA-MC= vecto MB+MD

vẽ con chó giống thật hòa chút cute

Làm giúp với ạ mn Thanks trước ạ!!!

làm giùm mik bài 3 đến bài 6 nha

III. Give the correct form of adj 1- Rivers are (big)……………………………. than lakes. 2- The Mekong river is (long)………………….. than the Red river. 5- My mother is (old) …………………….than my teacher. 8- Nga and Lan are (short)…………………….. than Minh. 9- My mother is (young)…………………… than my father. 10- Ha Noi is (small)………………….than Ho Chi Minh city. 11- This boy is (tall)………………………..than that boy. 12- A dictionary is (thick)……………………….. than a notebook. 14- Buildings are (high)…………………….. than houses. 15- Can't you think of anything _________________________(intelligent) to say? 16- Well, the place looks _______________________(clean) now. 17- Janet looks _________________________________(thin) than she did. 18- You need to draw it _____________________________(carefully) . 19- The weather is getting ________________________ (bad). 20- The programme will be shown at a _______________________ (late) date. 21- I can't stay ______________________________(long) than half an hour. 22- A mobile phone would be a________________________ (useful) present. 23- I'll try to finish the job _______________________________ (soon). 24- It was__________________________ (busy) than usual in town today. IV- Rewrite these sentences using comparative adj 1- Lan is taller than Hoa. -> Hoa is……….………………………….………… 2- I am bigger than my sister. -> My sister is ……………………..….…………. 3- Jane cooks better than me. -> I cook…………………………………..………. 4- My mom is younger than my dad. -> My dad is ……………………………. 5- Nam is thinner than Minh. -> Minh is ……………………………………… 6- My father is heavier than me. -> I am …………………………………………... 7- That tree is higher than this tree. -> This tree is ………………………………. 8- My shirt is older than your shirt. -> Your shirt is …………………………….. V. Write sentence suing the comparative of the adjectives. 1. I / thin / my brother. => I am thinner than my brother. 2. A lake / small / a sea. ....................................................................................... 3. This book / good / that one. ....................................................................................... 4. The weather here / hot / the weather in my hometown. .............................................................................................................. 5. A mouse / small / a cat. ........................................................................ 6. The sun / big / the moon. ................................................................................. 7. A radio / cheap / a television. .................................................................................... 8. French food / good / English food........................................................................ 9. Your hair / long / my hair. ............................................................................ 10. A mountain / high / a hill...................................................................................... 11. A child / young / a man. ......................................................................................

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

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. ..............................................................................

Bài 7:Tìm một số biết rằng giảm số đó đi 3 lần rồi lại giảm tiếp 5 lần thì được số mới bằng 1/2 số nhỏ nhất có 2 chữ số.