Cho y=mx−2m−3y=mx−2m−3 có đồ thị (dm)(dm)
a) Khảo sát và vẽ đồ thị với m=−1m=−1
b) Tìm điểm cố định mà (dm)(dm) đi qua.
c) Định m để khoảng cách từ O đến (dm)(dm) đạt GTLN.

11. Lan sings (sweet)_____________________ than Hoa.

12. The weather this summer is even (hot)_____________________ than last summer.

13. People treat the others (kind) _____________________ in the countryside than in the city.

14. Farmers collect fruit (fast)_____________________ than others.

15. That young nomad herds his livestock _________________(good) than his father.

16. City children seem to react (quick) _____________________than those in the countryside.

18. After the summer holiday in a remote area, Jim studies (hard)_____________________.

19. My cousin painted his own room (skillful)_____________________ than I did.

20. The new harvest machine is (effective)_____________________ than the old one.

21. These factors contribute to making city life (difficult)_________________for its residents.

22. Nothing is (bad)___________________than being stuck in a traffic jam.

23. These fun cards will encourage kids to spell (go)______________________.

24. Karachi in Pakistan is the second (large)___________________city in the world in population.

25. Air pollution is the (serious)______________________problem in Beijing.