Tìm các giá trị của m để bất phương trình sau vô nghiệm: 2x^2 - (m^4 -m)x +m^2 -5m+4<0

Bài 5:Cho điểm O thuộc đường thẳng xy. Trên tia Ox lấy hai điểm M, N sao cho OM = 2cm, ON = 7cm. Trên tia Oy lấy điểm P sao cho OP= 3m. a) Tính độ dài đoạn thẳng MN, NP b) Chứng minh rằng M là trung điểm của đoạn thẳng NP. c) Gọi I là trung điểm của đoạn thẳng MN. Tớnh MI, OI. ko cần vẽ hình nha

Đốt cháy hoàn toàn 3,6g cacbon trong bình chứa 11,2 lít khí oxi (đktc) a) Chất nào còn dư sau phản ứng trên? Tính khối lượng chất dư đó. b) Tính khối lượng & thể tích cacbon đioxit tạo thành.

anh/ chị hãy viết một đoạn văn khoảng 200 chữ trình bày suy nghĩ ý nghĩa sự trưởng thành của con người trong cuộc sống.

miêu tả giờ chào cờ vào ngày khai giảng ko chép mạng

Gọi M là trung điểm của đo n thẳng AB và C là một điểm của đo n thẳng đó . Cho biết AB = 6 cm ; AC = a ( cm ) ( 0 < a bé hơn hoặc bằng 6) Tính khoảng cách CM

1/ All smartphones…………………….storage hardware is big can store downloaded audio books A.that  B.Which   C.Whose   D.Whom 2/Using smart phones in class can distract students .......studying. * 3 điểm A. for     B.To      C.with      D.from 3/Using an .......device such as a laptop, you can learn English effectively. A.electric           B.electronic  C.electrical        D.electron 4/Do you know the the girl...........Tom is talking to? A. whose   B. Whom  C.Which   D.What 5/Mr Xuan Truong, .........was my first teacher, received an award for teaching excellence. A. that   B. Which  C.Who  D.Whose 6/Peter ..........is my brother studies well A. whom   B. Which  C. Who  D. Whose 7/This tablet is mine. Its screen has been scratched. A. This tablet, whose screen has been scratched, is mine. B. This tablet whose screen has been scratched is mine. C. This tablet whom screen has been scratched is mine. D.This tablet, that screen has been scratched is mine. 8/We are looking to find……………………………ways to stimulate learning and continually trying to improve the way we teach. A. portable and mobile B. ineffective and inappropriate C. shocking and amazing D. new and creative 9/Notebooks, tablets and cellphones are all technology…………………………students are accustomed to and can use as learning aids. A. That   B. Who  C. Which  D.whom 10/The house........my father built is big A. That    B. Which    C.who   D. Whose 11/To play audio tapes and CDs, you just need a cassette or CD...... A. Phayer                   B. recorder                           C. machine                D. tape 12/A......is a mobile computer that is also useful for language learning. A. desktop    B. Mobile phone C. tablet        D. Recorder 13/Students can also use word processing applications to…………………………their vocabulary. A. improve   B. Make  C.store  D.spend 14. While a child learns how to use educational………………….., she also develops a(n)……………….to analyze, synthesize and evaluate information. A. Lessons – knowledge B. lessons- ability C. software - ability D. software – knowledge 15/ Mobile devices increase opportunities for learning after school hours and increase teachers’…………………………….. and their comfort levels with technology A. intelligence    B. possibility C. ability              D. ways 16/ A major issue for teachers……………allow students to use their own devices is how to provide online access to such devices. * A. they    B. ones    C. who   D. those 17/ That media player, .........I often used to practise English , has some great apps. A. that   B. which   C. who  D. whose 18/ Lack of an education severely restricts a woman’s access…………Information and opportunities. * A. to    B. with     C. about     D. from 19/ In English class yesterday, we had a discussion ____ different cultures. A. around    B. about   C. for   D. from 20/ Letting students use their own digital devices in class can improve the…………………………experience in many ways. A.education           B.educational   C.educationally      D.educator 21/Quang answered the phone. He told me you were out. A. Quang who told me you were out answered the phone. B. Quang whom he told me you were out answered the phone. C. Quang, who answered the phone, told me you were out. D. Quang, who told me you were out, answered the phone.* 22/ Computer games………………..encourage players to move up levels and earn high scores may help develop mathematical skills. A. Which   B. Whose   C.Who  D.Whom

Các phương pháp sản xuất thức ăn cho vật nuôi

giúp mk bài này vs bài 2 nha mn ai trả lời sẽ đc cảm ơn và 5 sao nha

PART 2 : Rewrite the sentences (viết lại theo công thức mệnh đề ko giới hạn) 1,The boy is my brother. He is wearing a red T-shirt. ->The boy......................................................................... 2,The woman is Linda. She is sitting on the chair. ->The woman............................................................. 3,Trong Tan is a famous singer. He sang a song on TV last night. ->Trong Tan........................................................................................... 4,The book is interesting. The book was written by Nguyen Du. ->The book........................................................................................... 5,The man is an artist. He can talk four languages. ->The man..................................................................... 6,My father is a teacher. He like reading books and watching TV ->My father