cho đường trong(O;R); một đường thẳng d cắt đường tròn tại A và B lấy điểm C thược d sao cho B nằm giữa A và C từ giữa P của cung lớn AB kẻ đường kính PQ cắt AB tại D,CP cắt (O) tại điểm thứ hai I.Giao điểm của AB và IQ là K a)chứng minh PDKI nội tiếp b)chứng minh CI.CP=CK.CD c)chứng minh IC là phân giác ngoài của tam giác AIB Giúp mình với ạ

help nhanh viết về địa dịch covid bằng TA

Cho : A= ($\frac{x-y}{\sqrt[]{x}- \sqrt[]{y}}$ - $\frac{x\sqrt[]{x}-y\sqrt[]{y}}{x-y}$): $\frac{x\sqrt[]{y}+y\sqrt[]{x}}{x+y+2\sqrt[]{xy}}$ a, Rút gọn A b, Chứng minh 0<A<1

Vẽ anime Nl: vô nhận avt nè :")

5. He suggested watching a comedy. “Let’s ” he said.

Giúp mình với ạ , hứa vote 5 * I. Choose the word which has the underlined part pronounced differently. 1.A. mobile B. modern C. electronic D.concentrate 2. 2.A. assignment B. address C. discussion D. access 3. 3. A. beautiful B. consumption C. chemical D. dangerous Văn bản một dòng. 4. 4. A. government B. organize C. animal D. confusion 4. 4. A. government B. organize C. animal D. confusion 4. 4. A. government B. organize C. animal D. confusion 5. 5. One of the aims of Greenpeace is to ________ of the environmental problems facing our planet. A. take responsibility B. arouse interest C. raise concern D. raise awareness Văn bản một dòng. 6. __________ are very anxious about the falling rhino population. A. Environmentalists B. Environmental activities C. Conservationists D. Naturalists Văn bản một dòng. 7. 7. The heavily polluted water near the factory ________ the safety of the local people. A. endangers B. preserves C. contaminates D. is threatened 7. 7. The heavily polluted water near the factory ________ the safety of the local people. A. endangers B. preserves C. contaminates D. is threatened 9. A: “Thank you so much for your support” - B: “________” A. Welcome! It’s very nice of you B. Well done C. There is nothing I can do about it D. It’s my pleasure 10. The man ________ that he had done this before and that he had some experience in the field. A. told B. said me C. talked D. said 11. For the ________ of environment and for the people who live in it, we must eliminate pollution immediately. A. sick B. rich C. sake D. harmful 11. For the ________ of environment and for the people who live in it, we must eliminate pollution immediately. A. sick B. rich C. sake D. harmful 11. For the ________ of environment and for the people who live in it, we must eliminate pollution immediately. A. sick B. rich C. sake D. harmful 12. Sugar is the ________ of healthy teeth. A. destruction B. destructively C. destroying D. destroyer 13. Make sure your car runs on unleaded petrol and your home uses sources of ________ energy. A. recycling B. reused C. renewable D. recyclable 14. Most of the air pollution results ________ the burning of fossil fuels, motor vehicles, factories, aircraft and rockets. A. in B. to C. on D. from 15. Environmental pollution is becoming an ________ serious problem that needs to be taken care of as soon as possible. A. increasingly B. increasing C. increase D. increased 16. It is predicted that over the next few decades many species will die ________ as once fertile areas turn to desert. A. off B. out C. up D. down 17. IV/ Choose the word(s) CLOSET in meaning to the underlined word(s) in the following questions. 17. One of the main area of this organization is the sustainable use of natural resources. A. maintainable B. forgettable C. visible D. vegetable 18. Overusing chemical sprays and fertilizers makes land arid A. very dry B. very wet C. stormy D. rainy 19. V/ Choose the word(s) OPPOSITE in meaning to the underlined word(s) in the following questions. 19. Fresh water is very important to life because no one can live without it. Yet it is one of the limited and most endangered natural resources on our planet. A. Clean B. Drinkable C. Polluted D. Running 19. V/ Choose the word(s) OPPOSITE in meaning to the underlined word(s) in the following questions. 19. Fresh water is very important to life because no one can live without it. Yet it is one of the limited and most endangered natural resources on our planet. A. Clean B. Drinkable C. Polluted D. Running 20. One way to protect our environment from pollution is to reduce wasteful consumption. A. costly B. excessive C. safe D. economical

Cho mình hỏi là có ai biết phân biệt khi nào dùng to V và Ving không ạ???....mình vẫn chưa hiểu phần này😢

Cho hệ phương trình : a^2x - y = -7 2x + y = 1 Gợi nghiệm của hpt là (x,y) , tìm các giá trị của a để x+y=2

Which countries have the most natural disasters? Are there any countries that don’t have natural disasters? Why? từ cái chủ đề này mọi người suy ra nhiều câu hỏi khác giúp mik nhé

Cho pt : x bình -5x+m-1=0 Tìm m để pt có 2 nghiệm pb x1x2 Tìm m để pt có 2 nghiệm pb x1x2 thỏa mãn điều kiện căn x1+căn x2 =3