Câu 1: Tìm tập nghiệm S của bất phương trình x^2-4>0 A. S= (-2 ; 2). B. S =(- vô cùng; -2) hợp (2 ; + vô cùng). C. S = (- vô cùng; - 2] hợp [2 ; + vô cùng). D. S=(- vô cùng; 0) hợp (4; + vô cùng). Câu 2: Tìm tập nghiệm S của bất phương trình x^2 – 4x + 4>0. A. S = R. B. S = R\{2}. C. S = (2; + vô cùng). D. S =R\{-2}. Mọi người ơi giúp mình giải câu 1 vs câu 2 vs ạ

Các câu hỏi liên quan

3. “Which way did they go?” he asked. - He asked... ...................................................................... 4. “Bring it back if it doesn’t fit”, I said to her. - I told... ............................................................................ 5. “Don’t try to open it now,” she said to us. - She told... ........................................................................ 6. “Is it going to be a fine day today?” I asked her. - I asked her... .................................................................... 7. “He’s not at home”, she said. - She said that... ................................................................. 8. “Is the bus station far away?” the girl asked. - The girl wanted to know... .............................................. 9. “Don’t stay out late, Ann” Tom said. - Tom told Ann... ............................................................... 10. “Please let me borrow your car,” he said to her. - He asked... ........................................................................ 11. “Jean, have you seen my gloves?” Thomas asked. - Thomas asked Jean..... 12. Don’t leave the window open, Mary”, I said. - I told Mary.... ................................................................... 13. “I’ll have a cup of tea with you,” she said. She said that... 14. “I’ll pay him if I can” she said. - She said that... ................................................................... 15. “What are you going to do next summer?” she asked. - She asked us.... ...................................................................