Đáp án:0$\leq$ y$\leq$4
Giải thích các bước giải:
y-2=cos2x-căn 3 sin2x
(1)²+(căn 3)²$\geq$ (y-2)²
⇔4$\geq$ y²-4y+4
⇔0$\geq$ y²-4y
⇔0$\leq$ y$\leq$4
Hongg hiểu hỏi mình nha bạn ~
1. When I was a child, I _____________ like ice-cream, but I don’t like it now. A. am used to B. used to C. use D. am used for 2. Shampoo _____________ washing your hair. A. is used to B. gets used to C. is used for D. uses 3. I _____________ wearing glasses. A. am used to B. used to C. use D. am used for 4. We live in the capital now but we _____________ live in a small village. A. used to B. are used to C. use D. get used to 5. Gold _____________ making jewelries. A. gets used to B. uses C. used to D. is used for 6. The baby _____________ getting up early. A. used to B. don’t get used to C. is not used to D. is used for 7. Cheques and credit cards _____________ storing wealth. A. use B are used for C. used to D. get used to 8. Jack doesn’t smoke any more but he _____________ smoke 20 cigarettes a day. A. uses B. is used to C. is used for D. used to 9. Money _____________ buy food, furniture and other things. A. is used for B. used to C. uses D. is used to 10. She usually _____________ dictionary to find the meaning of difficult words. A. is used to B. is used for C. used to D. uses 11. He _____________ reading newspaper in the morning. A. used to B. is used C. is used for D. gets used to 12. A raincoat _____________ protecting us from rain. A. is used to B. used to C. is used for D. uses 13. _____________ eat sweet a lot when you were a child? A. You used to B. Are you used to C. Did you use to D. Did you use 14. Pete won’t get used to the night shift. He needs his sleep. A. work B. worked C. working D. to work 15. I _________ a teddy bear, but I don’t have one now. A. used to having B. used to have C. was use to have D. was used to have CÁC BẠN LÀM VÀ GIẢI CHI TIẾT GIÚP MÌNH VS Ạ
Nêu lịch sử và phát triển 1 đô thị ở địa phương Gợi ý: sgk địa lớp 9 bài 3,4
-2x^2 (x^2 - 1) + 2x(x^3 + 5x) = 0
Hiệu của hai số tự nhiên là 134. Viết thêm một chữ số vào bên phải số bị trừ và giữ nguyên số trừ , ta có hiệu mới là 2297. Tìm chữ số viết thêm và hai số đó?
Bài 1.3: Cho hình vuông ABCD cạnh a. a) Chứng minh: bốn đỉnh A, B, C và D của hình vuông trên cùng nằm trên một đường tròn. b) Xác định tâm và bán kính của đường tròn đó.
Nghĩa của bị động thì là gì vậy mng:((
Exercise 4 : Complete the sentences with although/ in spite of/ because/ because of. 1. ____________ the meeting’s at 2.00, I won’t be late to see you. 2. ____________ I told the absolute truth, no one would believe me. 3. The goods were never delivered ____________ the promise we had received. 4. My mother is always complaining ___________ the untidiness of my room. 5. I didn’t get the job ____________ I had all the necessary qualifications. 6. It’s unsafe to travel in that country _____________ the ongoing civil war. 7. The villagers refused to leave ___________ the drought. 8. ____________ everything looked different, I had no idea where to go. 9. __________ his age, John was not hired ___________ he had the necessary qualifications. 10. You can’t enter this secure area _____________ you don’t have an official permit. 11. ___________ it was sunny, it was quite a cold day. 12. Several people in the crowd became ill and fainted ___________ the extreme heat. 13. ____________ having a bad cough, she was able to sing in the choir. 14. ___________ I had nothing for lunch but an apple, I ate dinner early. 15. Sarah can’t climb up the tree ___________ her fear of heights.
vẽ cho tui thứ mà bạn dng tưởng tượng
có mấy loại nơron tạo nên 1 cung phản xạ
Giải giúp e với ạ E đang cần gấp lắm y= sin³x+cos³x (giải thích hộ e lun ạ)
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