Xét tính ĐB, NB Y=-$x^{4}$ +4$x^{2}$ +5

Mọi người lm giúp mình câu 1 lâu ko đụng h ko bt cách lm lun

viết lại câu: 1) We no longer play football in the neighorthhood. => We used __________________ 2) He hasn't been back to his hometown for over 20 year now. => It is_________________ 3) Having nowhere else to go, i tried to sleep in the watitng room. => As___________________ 4) No one else in this school can run as fast as Ba. => Ba is the _____________

XV. Write about your book collection. Complete the gaps of the paragraph, using the cue given to you. 1. Name of your collection: - books - books about animals and plants; story books; books about school subjects - books about English-speaking countries 2. How you collect them: - buy from bookshops or second-hand book stalls - get from friends or family members 3. Why you collect them: - get information and facts - broaden knowledge and understanding 4. Your plan in the future: - make the collection larger - open library Your answer: My hobby is (1) . I collect books whenever I have money and I need some books. I collect many kinds of books such as (2) ; story books or (3)_____________ I am learning at school, you know, English, Maths, History, Geography, Biology; and books about (4) . I buy books from (5) near my house, and some others from (5) . I also get books from (6) . I collect books because I would like to (7) from books. They help me broaden (8) . In the future, I try to make my collection (9) . I would like to open (10) of my own.

Hóa 10 bài tập bt đã có dạng này chưa ạ CO2−3+2H+→CO2+H2O HCO−3+H+→CO2+H2O Gọi số mol CO2−3CO32− và HCO−3HCO3− Nếu có chương mấy học ạ . Em cảm ơn

Hộ mik với ạ đang cần gấp lắm cảm ơn mn nhiều :^

Anh chị ơi giúp em với, em xin cảm ơn :3333

Các cao thủ ơi Hội tụ giải đề nào

Giúp mk giải bài này với , mk đag cần gấp , câu 1 thôi cx đc

Xét tính ĐB,NB y=$x^{4}$+2$x^{2}$-3