Câu 1: Cho hàm số y =x²/4 các điểm sau điểm nào thuộc đồ thị hàm số: A. (2; 2) B. (3 ; 3) C. (4 ; 4) D. (1; 1) Câu 2: Hàm số y = -5x² là hàm số đồng biển khi : А. х = 0 В. х <о с.="" х€r="" d.="" x="">0 Câu 3: Điểm P(-1;2) thuộc đổ thi hàm số y =-mx² khi m bằng : A. 4 B. 2 C. -2 D. -4 Câu 4: Với a> 0 hàm số y = ax² là hàm số: A. nghịch biến khi x<0 C. nghịch biến khi x>0 B. đồng biến khi x-0 D. đồng biến khi x<0 Câu 5: Đồ thị của hàm số y = ax² đi qua điểm A ( 2 ; 1) . Khi đó giá trị của a bằng : A. 4; B. 1; C.1/4; D.1/2; Câu 6: Cho hàm số y= -√3 x². Kết luận nào sau đây là đúng: A. Hàm số luôn luôn đồng biến ; B. Hàm số luôn luôn nghịch biến C. Hàm số đồng biến khi x> 0 và nghịch biến khi x< 0; D. Hàm số đồng biển khi x < 0 và nghịch biến khi x > 0 II/ Tự luận: Câu 1: Cho hàm số y = f(x) = -4x² a) Tính : f -1 ;f (1/2) b) Nêu tính chất của hàm số trên. Câu 2: Cho hàm số y = (m – 3)x² với m 3. Tim m để hàm số đồng biến khi x < 0 Câu 3: Tim hệ số a biết đồ thị hàm số y = ax² đi qua điểm M (2;4) Câu 4: Vẽ đồ thị hàm số y =1/2x²

Các câu hỏi liên quan

jup mik nhé! chỉ có 1 bài thôi nên các bạn jup mik nhé làm ơn. bạn nào giỏi anh thì giúp mik với ạ primary / state / timetables / private / subjects fees / nursery/ school holidays /secondary /exams What are the different types of schools in the UK? In the UK, your time at school is divided into three chunks: pre-school, primary and secondary education. Pre-school is when you first start spending days away from home as a toddler at (1) _______. Your (2) _______ education is generally from the age of around 5 to 11. (3) _______ education is usually from the age of 11 to 16, although you may decide to stay in school until you are 18. The way you are taught in schools is slightly different depending whether you live in England, Scotland, Wales or Northern Ireland. Other things like the dates of (4) _______ may also be different. There are two main types of school - ones that are paid for by the government and ones which aren't. Schools may be slightly different across the UK. (5) _______ school This is a school which is paid for by the government, so your parents will not have to pay school (6)_______. The majority of children go to this kind of school. Generally, schools that are paid for by the government have to follow the national curriculum. Comprehensive school A comprehensive school is the name for a school which anyone can go to - regardless of how well they do in (7) _______ - and where everybody is taught together. Grammar school A grammar school is a school which children can go to from the age of 11. But it is different from comprehensive one because it selects pupils using an exam known as the "11-plus". The test often involves (8) _______ like math, verbal reasoning, comprehension and creative writing. Academies and free schools These are types of school that are paid for by the government but are allowed more freedom over their own curriculum, (9) _______ and the students they let in. Unlike comprehensives, they get their money directly from the government. Independent school These schools, also called (10) _______ schools, have more say over how they run themselves, as they are not paid for by the government